Consulta: year:"1949"
Registros recuperados: 192
Data/hora: 02/06/2024 13:07:33

Культуры, выведенные из материалов экспедиций 1946 г.
Provedor de dados: 13
Autores: Копп, Ф. И.
Tipo: Journal Contribution
Ano: 1949
URL: http://repository.ibss.org.ua/dspace/handle/99011/2056

Метаморфоз черноморских Decapoda
Provedor de dados: 13
Autores: Долгопольская, М. А.
Tipo: Journal Contribution
Ano: 1949
URL: http://repository.ibss.org.ua/dspace/handle/99011/2058

Биология питания морского ерша
Provedor de dados: 13
Autores: Фортунатова, К. Р.
Tipo: Journal Contribution
Ano: 1949
URL: http://repository.ibss.org.ua/dspace/handle/99011/2061

Cumacea Черного и Азовского морей
Provedor de dados: 13
Autores: Паули, В. Л.
Tipo: Journal Contribution
Ano: 1949
URL: http://repository.ibss.org.ua/dspace/handle/99011/2059

К вопросу о распределении бора в морях
Provedor de dados: 13
Autores: Добржанская, М. А.
Tipo: Journal Contribution
Ano: 1949
URL: http://repository.ibss.org.ua/dspace/handle/99011/2063

Видовой состав микроорганизмов Черного моря
Provedor de dados: 13
Autores: Крисс, А. Е.; Рукина, Е. А.; Бирюзова, В. И.
Tipo: Journal Contribution
Ano: 1949
URL: http://repository.ibss.org.ua/dspace/handle/99011/2057

О естественноисторическом районировании Черного моря и в частности у берегов Крыма
Provedor de dados: 13
Autores: Водяницкий, В. А.
Tipo: Journal Contribution
Ano: 1949
URL: http://repository.ibss.org.ua/dspace/handle/99011/2064

Материалы по количественному изучению зообентоса Черного моря. II. Каркинитский залив
Provedor de dados: 13
Autores: Арнольди, Л. В.
Tipo: Journal Contribution
Ano: 1949
URL: http://repository.ibss.org.ua/dspace/handle/99011/2060

Омары в Черном море
Provedor de dados: 13
Autores: Долгопольская, М. А.
Tipo: Journal Contribution
Ano: 1949
URL: http://repository.ibss.org.ua/dspace/handle/99011/2062

Роль микроорганизмов в превращении биогенных веществ в море
Provedor de dados: 13
Autores: Исаченко, Б. Л.
Tipo: Journal Contribution
Ano: 1949
URL: http://repository.ibss.org.ua/dspace/handle/99011/2055

Relatório do laboratório de fitopatologia do I.A.N. no ano findo de 1948.
Provedor de dados: 14
Autores: DANTAS, B.
Datilografado.
Tipo: Material não-convencional (literatura cinza)
Palavras-chave: Fitopatologia; Doença de Planta.
Ano: 1949
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1150653

O guaraná.
Provedor de dados: 14
Autores: PIRES, J. M.
bitstream/item/136901/1/OGuarana.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cultivo; Maues; Amazonas; Brasil; Cultivation; Processing; Disease; Pest.; Beneficiamento; Doença; Guaraná; Praga.; Amazonia.
Ano: 1949
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374223

Statistique des pêches maritimes - Années 1945, 1946, 1947
Provedor de dados: 5
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00163/27382/25611.pdf

Quelques aspects de la végétation des algues marines supérieures du Massif Armoricain
Provedor de dados: 5
Autores: Dizerbo, A. H.
Le Massif Armoricain qui compte plus de 700 km de littoral, est la région française la plus riche en algues marines et aussi la mieux étudiée par les algologues. Depuis le début du XIXe siècle, les herborisations se sont succédées sur toutes les côtes; cependant, l'inventaire de sa flore marine est loin d'être terminé. Actuellement, le nombre d'espèces d'algues marines supérieures qui y a été dénombré s'élève à environ 550:
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00041/15227/12545.pdf

Statistique des régions de pêche - année 1947 (1er et 2e semestres)
Provedor de dados: 5
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00041/15242/12560.pdf

La pêche sur les côtes du Calvados et de la Manche
Provedor de dados: 5
Autores: Le Dantec, Jean.
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00041/15228/12546.pdf

Les huîtres des côtes françaises Ostrea edulis et Gryphaea angulata
Provedor de dados: 5
Autores: Lambert, Louis.
Les bancs d'huîtres plates Ostrea edulis formaient jadis un cordon ininterrompu sur toutes les côtes de France. Quelques chiffres donneront une idée des quantités d'huîtres pêchées jadis sur les côtes françaises. A la fin du XVIII ème siècle et au début du XIV ème, les pêcheurs enlevaient des seuls bancs de Cancale et Granville au minimum cent millions d'huîtres par ans; leurs bateaux pêchaient du 1er Septembre au 1er Avril sans discontinuer. La destruction du naissain et des petites huîtres par les dragues très lourdes que l'on employait alors était plus grand encore. L'exportation, de 1772 à 1775, atteignit le chiffre de 293 millions. En 1775, notamment, 234 bateaux normands et 104 anglias emportaient de la baie de Cancale 95 millions d'huîtres.
Tipo: Text
Palavras-chave: Huître plate; Huître portugaise; Ostrea edulis; Gryphaea angulata; Ostréiculture; Récolte naissain; Technique élevage; Ennemis; Maladies; France.
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00004/11491/8055.pdf

Le contrôle sanitaire des huîtres, moules et coquillages
Provedor de dados: 5
Autores: Lambert, Louis.
L'eau de mer, l'eau du large, n'est pas stérile, bactériologiquement pure, mais il est reconnu qu'elle ne contient pas de microbes pathogènes à l'homme, en particulier le redoutable bacille d'Eberth ni ses cousins paratyphiques. Il n'en est malheureusement pas de même près des côtes où elle est trop souvent souillée par les écoulements des agglomérations. Cette souillure atteint parfois des gisements naturels sur lesquels vont pêcher innocemment les baigneurs ou moins innocemment certains pêcheurs.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Contrôle sanitaire; Moules; Coquillages.
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00004/11492/8057.pdf

L'ostréiculture en Amérique du Nord (Etats-Unis et Canada)
Provedor de dados: 5
Autores: Lambert, Louis.
La confédération Nationale de la Conchyliculture ayant décidé d'envoyer une délégation de Professionnels en Amérique pour y étudier l'ostréiculture sur la côte Est des EtatsUnis et du Canada. M. Louis LAMBERT, Dr. Ph., Inspecteur général à l'Office Scientifique et Technique des Pêches Maritimes fût chargé par le Ministère de la Marine Marchande et par le Directeur de l'Office des Pêches d'accompagner cette mission.  Les Délégués de la Confédération Nationale de la Conchyliculture étaient:  M. Alain PERGEVAULT. Président de la Fédération Bretonne à Auret M. Marcel THIEBLEMONT, Ostréiculteur à Plooharnel-Carnac.  Arrivée le 21 juillet 1948 à New-York, la mission devait visiter successivement: l'île de Long Island (Etat de New-York), puis le Long Island Sund...
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00041/15240/12558.pdf

Note complémentaire sur le Clam (Venus mercenaria)
Provedor de dados: 5
Autores: Lambert, L.
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00041/15239/12557.pdf

Note sur Venus mercenaria L., son introduction et son élevage dans le bassin de la Seudre
Provedor de dados: 5
Autores: Ruckebusch, H.
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00041/15238/12556.pdf

Statistique des régions de pêche - année 1948 (1er et 2e semestres)
Provedor de dados: 5
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00041/15243/12561.pdf

Le problème mondial actuel des pêches maritimes (1949)
Provedor de dados: 5
Autores: Le Gall, Jean.
Tipo: Text
Palavras-chave: Economics; Fishing gear; Catching; Fishes; Commercial species.
Ano: 1949
URL: http://archimer.ifremer.fr/doc/1949/publication-2207.pdf

Résumé des connaissances acquises sur la biologie du germon
Provedor de dados: 5
Autores: Le Gall, Jean.
Ce résumé des connaissances acquises .sur la biologie du Germon (Germo alalunga GMELIN) n'a pas la prétention d'être complet.  Etabli en vue de sa présentation aux Experts du Conseil International pour l'Exploration de la Mer, réunis à Tunis au 23 au 28 Juillet 1949, puis, d'être soumis à leurs critiques, il n'a que le caractère d'un " condensé " forcément incomplet des nombreux travaux qui ont été publiés sur le sujet. Certains documents nous ont manqué ; des faits d'observation ont été omis que d'autres trouveront essentiels; tel qu'il est, il nous paraît résumer la somme de nos connaissances sur la biologie de ce poisson qui, par suite du développement de l'industrie de la conserve dans le monde, a pris, depuis une trentaine d'années, une importance...
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00041/15226/12544.pdf

La senne « guezennec » ou filet tournant de Saint-Guénolé
Provedor de dados: 5
Autores: Priol, E.p.
Le premier engin de ce genre qui fit son apparition en eaux bretonnes, fut la grande senne Belot. en 1873. Elle fut proscrite dès 1878, les captures trop abondantes ayant provoqué l'effondrement des cours.   Cette première senne avait pour unique objet la pêche des sprats, toujours abondants en baie de Douarnenez à longueur d'année, surtout pendant la période hivernale. Or, la baie d'Audierne, plus ouverte, voit la disparition totale (ou presque) des clupéides en décembre ou janvier, mois où, en période normale, l'activité de la pèche du sprat atteint son maximum à Douarnenez. Dès la fin du 19me siècle, des essais furent tentés par les pêcheurs de St-Guénolé pour capturer la sardine qui abonde en baie d'Audierne pendant la période automnale, tandis que les...
Tipo: Text
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00041/15229/12547.pdf

De asymmetrische gedaante der aarde en haar oorzaak
Provedor de dados: 16
Autores: Escher, B.G.
Toen Cirillo Generelli in 1749 in de academic van Cremona een commentaar op de theorie van Lazzaro Moro (1687—1740) leverde, gaf hij te kennen, dat de geschiedenis der aarde zonder geweld, zonder verdichtsels, zonder veronderstellingen en zonder wonderen („senza violenze, senza finzioni, senza supposti, senza miracoli”), maar uitsluitend met behulp der tegenwoordige gebeurtenissen op aarde verklaard kan worden (Lyell, 1853, p. 37). Hij zal toen wel niet vermoed hebben, dat het nog tachtig jaren zou duren, voordat deze nieuwe zienswijze het geologische denken zou gaan beheerschen. Want eerst kwam Cuvier de klok terugzetten door in 1812 in het „Discours preliminaire” zijner „Recherches sur les ossements fossiles” (later gepubliceerd onder den naam „Discours...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/505794

Introduction
Provedor de dados: 16
Autores: NN.
The first instalment of ”Flora Malesiana” was published in the last days of December 1948. The issue was 2500 copies, of which 1500 have been distributed. It contains a notice on 4 unnumbered pages (the first the provisional title page) which explains the scheme for the whole of the Flora while a brief outline is given of the contents of volumes 1-4 of the first series.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/533192

Note on Charybdis ihlei nov. spec., Charybdis beauforti nov. spec., and Charybdis edwardsi nom. nov., from the collections of the British Museum (Natural History), London
Provedor de dados: 16
Autores: Leene, Jentina E.; Buitendijk, Alida M.
The material on which the present paper is based has been found in the collections of the British Museum in 1939, when a grant of the “Linnaeusfonds” enabled the first named author to pay a short visit to London; it has been brought over to Holland after the war in 1947 by the second author. As it forms an addition to the earlier papers and especially to the thesis of the first named author, the same form of publication has been chosen. For the drawings of habitus and abdomina we are indebted to Mr. J. F. OBBES.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/503973

Zosterops montana minima nomen novum for Zosterops montana minor Hoogerwerf &amp; De Boer from Mt. Papandajan (South Priangan, West Java)
Provedor de dados: 16
Autores: Hoogerwerf, A.
In a previous paper (Hoogerwerf and De Boer, 1947, p. 252) we described as Zosterops montana minor a new white-eye from Mt. Papandajan (South Priangan, West Java). Mr. A. C. V. van Bemmel and Dr. Ernst Mayr, however, called our attention to the fact, that the subspecific name minor cannot be used in this case, because this name is preoccupied by Zosterops albiventer minor Meyer. 1874 (p. 105) from Jobi, New Guinea, which is known as Zosterops minor minor in Mayr's (1941) List. On account of the above we have to introduce a new name for Zosterops montana minor. We take this opportunity to add to the original dutch description the following particulars. Siebers (1929, p. 151) separated birds belonging to this species from Central Java (Mt. Sumbing and...
Tipo: Article / Letter to the editor
Palavras-chave: 42.83.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/318660

Over de Entomologie, het hoger onderwijs en enige verwante zaken
Provedor de dados: 16
Autores: Leefmans, S.
Deze bescheiden bijdrage aan de bundel bij het afscheid van de hoogleraren L. F. DE BEAUFORT en J. W. E. IHLE, schrijf ik met een oprecht gevoel van leedwezen, want hun nuttige openbare, officiële werkzaamheid ten bate van de Zoölogische wetenschap neemt een einde, gelukkig op normale wijze, wegens het bereiken van de gestelde leeftijd voor een otium cum dignitate. Moge hun een hoge leeftijd in gezondheid van lichaam en geest beschoren zijn, want dat hun wetenschappelijke werkzaamheid nu zal eindigen, gelooft wel niemand, die hen kent!
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504203

The species of Metopograpsus (Crustacea, Brachyura)
Provedor de dados: 16
Autores: Tweedie, M.W.F.
The most recent comprehensive treatment of this Indo-Pacific genus ¹) is that of TESCH (1918, p. 78-82). Here seven species are recognised with the reservation that M. eydouxi H. Milne Edwards and M. thukuhar (Owen) are possibly not distinct. In 1936 (TWEEDIE 1936, p. 49) I questioned the validity of the character used to separate M. latifrons (White) and M. maculatus H. M.-E., the relation of carapace length and breadth, and placed maculatus in the synonymy of latifrons.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504257

Sur la biologie du Castor du Rhône (Castor fiber L.)
Provedor de dados: 16
Autores: Urbain, Achille.
Le Castor du Rhône ( Castor fiber L.) a été particulièrement bien étudié par de nombreux auteurs. VICTOR PIRAUD ¹) a donné d’intéressants renseignements sur ses moeurs; M. P. CORDIER ²) et A. HUGUES ³) ont fait aussi une étude appronfondie de cet animal et L. GERMAND 4) a fourni une description détaillée des colonies de Castors de la région Avignonaise. Autrefois très abondant en France où il habitait la plupart des rivières, le Castor n’existe plus actuellement que sur le Rhône, certains de ses affluents et en Camargue. Grâce aux mesures énergiques de protection dont il est l’objet depuis un certain nombre d’années, il s’est multiplié et actuellement le nombre de ces colonies ne fait que s’accroître. Les stations les plus réputées sont les suivantes:
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504468

State of progress in Malaysian plant taxonomy
Provedor de dados: 16
Autores: NN.
Dr C.A. Backer finished the MS on the Amaranthaceae for the Flora Malesiana; he started work on the Chenopodiaceae, Aizoaceae and other families. Mr R.D. Hoogland, Leyden, finished the revision of Malaysian Tetracera, Acrotrema, Didesmandra and Hibbertia. He will soon start to work on Wormia and Dillenia.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/533388

Bijdrage tot de kennis van de Nederlandse spinnenfauna (Araneae)
Provedor de dados: 16
Autores: Jong, B. de.
De hier besproken soorten zijn alle nieuw voor de Nederlandse fauna in zoverre, dat zij niet vermeld staan in de Catalogus Aranearum van VAN HASSELT. De collectie van deze araneoloog bevindt zich in het Rijksmuseum voor Natuurlijke Historie te Leiden en wordt daar momenteel gerevideerd, waarna een nieuwe naamlijst van Nederlandse spinnen zal worden samengesteld. In deze bijdrage wordt geen poging gedaan de twijfelachtige synoniemie van de Catalogus op te helderen, hetgeen zeker nog menige nieuwe soort voor ons land zal opleveren. Zij is slechts een tussentijds resultaat van het bewerken van de eigen collectie en van materiaal, dat mij van verschillende zijden ter bewerking werd toevertrouwd. De gebruikte systematische indeling en de soortnamen zijn in...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504450

Three different agglomerations of blood cells in a Caliroa limacina larva
Provedor de dados: 16
Autores: Barendrecht, G.
Some time ago in our laboratory a number of larvae of Caliroa limacina Retz., the well known slug like sawfly larva of the pear, were fixed in toto and sectioned into complete series, which were coloured with EHRLICH’S or HEIDENHAIN’S haematoxylin and counterstained with eosin. Most of these larvae belonged to the last instar but one, i.e., the last instar still feeding and showing the typical mucous covering. The very last instar does not feed any more and lacks the mucous covering, showing the yellow cuticle. As in many other insects, in these larvae the blood cells during fixation agglutinate in a peculiar way. They constitute in the sections compact cell masses imitating a real tissue, but showing, in our preparations, hardly any cell boundaries. Such...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/503873

Insectarium-varia
Provedor de dados: 16
Autores: Polak, R.A.
Aan het vererend verzoek hier iets van mij te laten horen geef ik met schroom en aarzeling gehoor. Door de oorlog zijn mijn entomologische verzamelingen, mijn boeken en aantekeningen verloren gegaan. Op mijn tachtigjarige leeftijd ben ik hierdoor niet in staat iets passends in dit kader te leveren. Daarom veroorloof ik mij uit mijn herinnering uit de reeks van jaren, waarin ik voor het Insectarium in „Artis” ben werkzaam geweest, enkele opmerkingen van bezoekers als hors d’oeuvre aan te bieden. Het Insectarium is in het voorjaar 1898 begonnen in een der kleine vertrekjes van het Fauna-museum. Op een warme zomermiddag pufte een welgedaan en welaangedaan heertje binnen. Het keurige matelootje zwaaide in zijn hand en zijn gouden horloge-ketting bungelde op...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504200

Sacculina beauforti and Loxothylacus ihlei, two Rhizocephala of the Crab Scylla serata (Forsk.)
Provedor de dados: 16
Autores: Boschma, H.
With great pleasure I dedicate the two new species described below to the two Amsterdam zoologists Prof. L. F. DE BEAUFORT and Prof. J. E. W. IHLE, who with their important researches in various branches of zoology both have so largely contributed to the progress of this science. The two species described here are parasites of Scylla serrata (Forsk.); they are the only specimens until now known to infest this species of Portunid crab.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504407

Hormetica luteomarginata, a new Blattid (Orthoptera) from Brazil
Provedor de dados: 16
Autores: Buitendijk, C.F.A.
While studying the small but interesting collection of Blattidae, submitted to me for study by Mr. C. Willemse of Eygelshoven (L.), I found a new Blattid for which I propose the name Hormetica luteomarginata nov. spec. The new species is represented in the Willemse collection by two male specimens. It belongs to the forms having the tegmina marked with black and the tegmina and wings extending beyond the apex of the abdomen. The most striking features are the fully developed tegmina and wings, the black band extending along the anal sulcus and the yellowly bordered black abdomen. Type ♂; Esperito Santo, Brazil (Willemse collection). Size medium for the genus, form moderately depressed, elliptical (fig. 1). Head in dorsal aspect not visible cephalad of...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/318186

Salt-tolerance of fresh-water fish groups in relation to zoogeographical problems
Provedor de dados: 16
Autores: Myers, George S.
The distribution of fresh-water fishes like that of other groups, has been widely utilized by zoogeographers, but with widely divergent acumen and success. At one extreme are those non-ichthyologists who have uncritically utilized for evidence certain groups whose distribution happens to support whatever theory they may be espousing. At the other extreme is the work of careful ichthyologists like DE BEAUFORT (1913) and REGAN (1922) whose thorough knowledge of the groups with which they are working demands the most careful consideration of their conclusions. However, no zoogeographer who utilizes the evidence of diverse groups can be familiar at first hand with all of them, and the difficulty facing such workers is that of seeking out the really dependable...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504681

De functie van de rode vlek op de snavel van de Zilvermeeuw (Larus a. argentatus Pontopp.)
Provedor de dados: 16
Autores: Tinbergen, N.
Een Zilvermeeuw voert zijn jongen op de volgende wijze: hij loopt in eigenaardig gebukte houding, een „klaaglijk” klinkende, langgerekte „au”-roep uitende, op de jongen toe, braakt grote brokken halfverteerd voedsel uit, neemt hiervan een klein stukje tussen de snavelpunten en houdt dat een jong voor. Het kuiken pikt naar de snavelpunt, aanvankelijk nog met betrekkelijk slecht gerichte bewegingen en herhaalt dit totdat het een stukje voedsel in de snavel krijgt, dat het dan doorslikt. Soms ook pikt het kuiken zelf van het op de grond liggende braaksel. Het is HEINROTH, die zovele vogelsoorten en ook Zilvermeeuwen uit het ei opgekweekt heeft, opgevallen dat de kuikens al dadelijk na het uitkomen de neiging tonen, „nach unten zu picken, wenn man ihnen mit...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504612

Zoogdieren uit de Onderst-Pleistocene kuststreken van Nederland (with English summary)
Provedor de dados: 16
Autores: Schreuder, A.
Lower-Villafranchian landmammals lived in the South of the Netherlands when the coastline of the North Sea retired in northern direction during the Plio-Pleistocene transition period. In the province of Zealand their black remains have been fished out of the waters of the Scheldt in the depth of which littoral Poederlian deposits (Amstelian deposits are missing there in Zealand) occur and are eroded by the currents. Also borings in the provinces of Limburg and Guelderland have yielded black fossils of this fauna of which the following species could be stated in the Netherlands: Eucladoceros falconeri (Dawk.), Odobenus huxleyi (Lank.), Alachtherium spec., Anancus arvernensis (Croiz. et Job.), Archidiskodon planifrons (Falc. &amp; Caut.), Gazella schreuderae...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504298

The birth of a Lycaon pictus L. in the Zoological Garden of Warszawa
Provedor de dados: 16
Autores: Zabinski, J.
It is notorious that the lycaon, the negro evil of plains, while by no means a declining race in Africa, has always been rare in Zoological Gardens. The reasons of this are twofold and closely interrelated. The animal presented some difficulties to rearing, readily perished and withal was not subject to reproduction in captivity and so there were no new born animals available for exchange between Zoological Gardens. Causes for the non resistance of lycaons under conditions of Europe are to be found less in climate differences between Europe and Africa — for the habitat of these plain animals to the South reaches far beyond the tropic of Capricorn — and so lycaons should not be excessively susceptibLe to the European climate and especially to temperature...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504248

Het experimenteel beinvloeden van het verloop der generaties bij de Coloradokever (Leptinotarsa decemlineatasa Say)
Provedor de dados: 16
Autores: Wilde, J. de.
Etude expérimentale de la succession des générations chez le Doryphore (Leptinotarsa decemlineata Say). On a confirmé la presence d’une diapause vraie dans le cycle évolutif du Doryphore, diapause qui commence peu de temps après la mue imaginale. On peut, par une température et éclairage favorable, supprimer cette diapause en faveur de la réproduction. A 25-29° C. et éclairage continue de 3750 Lux, la suppression de la diapause a réussi pour 50 % des individus. La diapause est accélérée quand la température monte; la durée de la praediapause est doublée quand la température s’abaisse de 29° C à 15-25° C. La diapause imaginale du Doryphore diffère de la diapause nymphale des Lépidoptères en ce qui concerne l’influence d’une periode de froid. Une telle...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504043

L’akinésie expérimentale chez le cobaye, après élimination du sens visuels et des labyrinthes
Provedor de dados: 16
Autores: Ten Cate, J.
On peut provoquer, chez différents animaux, les états d’akinésie expérimentale rapportés par la bibliographie sous le nom d’„hypnose animale”. Ces états ont été décrits pour la première fois par SCHENDTER en 1636, et par KIRCHER en 1646. On provoque, dans la plupart des cas, l’akinésie expérimentale en plaçant les animaux dans une position anormale dans laquelle on les maintient en réprimant toute tentative de leur part de reprendre la position normale et de s’enfuir.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504026

The genus Antemetula Rehder in the Indo-Westpacific area, with the description of two new fossil species
Provedor de dados: 16
Autores: Regteren Altena, C.O. van.
Tipo: Article / Letter to the editor
Palavras-chave: Antemetula Rehder; New species; 38.22; 42.73.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/273454

On the main branches of the pulmonary artery in some Viperidae
Provedor de dados: 16
Autores: Brongersma, L.D.
In all snakes, the Boidae and Xenopeltidae excepted, only the right lung is well developed, while the left lung is rudimentary or absent (BUTLER, 1895). The right lung consists of an anterior alveolar part that is strongly vascularized, and of a posterior smooth-walled air-sac that is anangious. Between these two parts a transitional zone may be present, in which the wall of the lung shows a faint reticulate pattern, and which receives some very fine branches from the pulmonary vessels. In a number of snakes, among which the Viperidae, the situation becomes more complicated. In these snakes the membrane that connects the dorsal ends of the incomplete tracheal cartilages has become greatly expanded, and this dorsal wall has developed an alveolar structure....
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504619

The Isopoda and Tanaidacea of the Netherlands, including the description of a new species of Limnoria
Provedor de dados: 16
Autores: Holthuis, L.B.
The Isopod and Tanaidacean Crustacea of the Netherlands have not been treated as a whole since 1889, when Hoek published the second part of his Crustacea Neerlandica dealing with the Isopoda and Amphipoda. Hoek in this paper mentioned 25 species of Isopoda, 9 of which are marine forms, 1 a freshwater form and 15 terrestrial, no Dutch Tanaidacea were known to Hoek. At present we know 49 species of Dutch Isopoda, of which 20 are marine, 2 are freshwater forms and 27 are terrestrial, furthermore three species of Tanaidacea are known from this country. The present paper is an enumeration of all Dutch species of the two above mentioned groups, with their distribution within our country and, if necessary, with remarks on their synonymy and ecology. A volume on...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/319226

Notes on a Sacculina carpiliae Guérin-Ganivet (Crustacea Rhizocephala)
Provedor de dados: 16
Autores: Boschma, H.
Certain Rhizocephalan parasites of the crabs Xanthias lamarcki (H. M. E.), Lybia tesselata (Latr.), and Glyptoxanthus vermiculatus (Lam.) mutually so closely correspond in all their characters that undoubtedly they belong to the same species. When the characters of this species are defined it appears that these practically correspond with the characters of Sacculina carpiliae Guér.-Gan. There are slight differences, not easily to define, and consequently not fit for a distinct specific description. Provisionally, therefore, the parasites of the crabs mentioned above are regarded as belonging to Sacculina carpiliae. The present paper contains notes on some specimens which undoubtedly belong to Sacculina carpiliae (parasites of Carpilius convexus (Rüpp.)),...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/318460

The growth of our Giraffes and Giraffe-calves
Provedor de dados: 16
Autores: Reventlow, Axel.
As far as I can recollect, only few reliable informations have been published concerning the total height and weight of new-born giraffe-calves; and as constant measuring of the growth of giraffes probably only in very few cases has been undertaken, I should like, by the following article, to contribute a little to the clearing of these matters. My opservations were made from March, 1939, until December, 1948, on 10 different giraffes whom I had the opportunity of studying at close quarters here in the Zoological Gardens of Copenhagen. On October 24th, 1915, we got a still-born giraffe-calf with a weight of 67,5 kg, the height unfortunately was not recorded.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504530

Säugetier-Territorien und ihre Markierung
Provedor de dados: 16
Autores: Hediger, H.
Inbezug auf ihren subjektiven Raum haben Tier und Mensch viel miteinander gemeinsam (vgl. HOLZAPFEL, 1943), vor allem das Bestreben nach einer deutlichen Abgrenzung, ferner die Art der Differenzierung und die ausgesprochene Tendenz zum Verharren (vgl. HEDIGER, 1946). Selbst in der modernen Wohnung finden wir eine Aufteilung, wie sie auch bei vielen Tieren vorkommt; es gibt Schlaf-, Ess-, Bade-, Vorrats-, Kotstellen usw. Nur einen Raumteil, der selbst in der primitivsten Eingeborenenhütte niemals fehlt, vermissen wir beim Tier grundsätzlich: die Feuerstelle. Hinsichtlich der Verbindungen zwischen den Örtlichkeiten mit speziell zugeordneten Funktionen hat von jeher nicht nur eine weitgehende Entsprechung bestanden, sondern zum Teil eine Überschneidung. Wohl...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504104

Pleistocene vertebrates from Celebes : IV. Archidiskodon celebensis nov. spec.
Provedor de dados: 16
Autores: Hooijer, D.A.
The fossil elephant remains recently discovered in S. Celebes by Mr. H. R. van Heekeren, and entrusted to me by Prof. Dr. A. J. Bernet Kempers, Head of the Archaeological Survey of the Dutch East Indies, belong to a small form of the genus Archidiskodon. These specimens, described and figured in the present paper, give the first evidence of the existence of Proboscidea in the island of Celebes. As stated already in earlier notes on the fossils in Mr. Van Heekeren's collection (Hooijer, 1948a, 1948b, 1948c) this elephant is associated with a fauna containing a peculiar suid (Celebochoerus heekereni Hooijer), a babirusa (Babyrousa babyrussa beruensis Hooijer), an anoa (Anoa depressicornis (Smith) subsp.), and a gigantic land-tortoise (Testudo margae...
Tipo: Article / Letter to the editor
Palavras-chave: 38.22; 42.84.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/318735

Notes on a small collection of Hydroids from Jersey (Channel Islands)
Provedor de dados: 16
Autores: Vervoort, W.
In the first months of 1941, whilst engaged with the study of Hydroids occurring along the coasts of the Netherlands, I received a small collection of Hydroids from Jersey for identification. These Hydroids, which were kindly sent to me by Mrs. W. S. S. van der Feen née van Benthem Jutting, curator at the Zoölogisch Museum at Amsterdam, had been collected by the late Mr. R. Oppenheim, a very studious amateur-naturalist, during a prolonged stay at Jersey from 1914-1918. Before his death Mr. Oppenheim placed a large number of fine drawings of Hydroids at my disposal, which were made during his stay at Jersey, where he had ample time and opportunities to study an extensive number of living Hydroids. Both drawings and Hydroids are now in the collections of the...
Tipo: Article / Letter to the editor
Palavras-chave: 42.72.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/318328

Quelques monstruosités chez les Cynoglossidés
Provedor de dados: 16
Autores: Chabanaud, Paul.
Cynoglossus polytaenia (Bleeker). Zoölogisch Museum (Amsterdam), n° 1276. Coll. Laboratoire pour l’Exploration de la Mer (Batavia), près Penang. Longueur totale 117 mm. Longueur étalon 106 mm. Fig. 1. A première vue, la nageoire dorsale parait interrompue vers le milieu de sa longueur, sur une certaine distance; la lacune est comblée par une série de rayons, série dont les 2 extrémités s’étendent sur le côté nadiral (droit) de chacune des 2 fractions de la nageoire normale. La fraction antérieure de celle-ci se compose de 39 rayons; la fraction postérieure, de 66 rayons.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504121

Communication on the attachment and the early development of Macroscelides (=Elephantulus) rozeti Duv., the North-African Junping Shrew
Provedor de dados: 16
Autores: Lange, D. de.
1. In Macroscelides (Elephantulus?) rozeti Duv., a North-African form, the pregnant uterus shows 3 swellings (sometimes this number is reduced to 1 or 2). The South-African form Elephantulus myurus Jamesoni, examined by prof. VAN DER HORST (Johannesburg) always shows two swellings, one in each half of the uterus horns. 2. The tuba is connected with a periovarial sac. 3. The eggs in the ampulla are naked and not surrounded by the zona pellucida. This causes sometimes the segmented cells to be set free. 4. The four-celled stage shows a tetrahedral arrangement. 5. In the uterus horn the unilaminar blastula is formed by the absorption of water. 6. In a stage of 120 cells the blastula-wall separates amoeboid cells into the interior forming a loose reticulum....
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504025

The snakes of Somaliland and the Sokotra Islands
Provedor de dados: 16
Autores: Parker, H.W.
The systematic status of the snakes recorded from the area has been reinvestigated, often in the light of new material. Allometric growth is shown to occur in several species and taxonomic errors arising from its previous non-recognition are rectified. The same feature is also used to determine the respective ontogenetic levels of closely allied forms. The fauna of the Sokotra group is shown to have greater relationships with the Palaearctic and Oriental regions than with the Ethiopian and to consist of mainly primitive types; they are assumed to have been isolated in the islands since the mid-Miocene. The mainland fauna, though predominantly Ethiopian, contains a strong northern admixture and this element predominates in the northern coastal plain which...
Tipo: Article / Letter to the editor
Palavras-chave: 42.82.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/317866

De la vie pelagique temporaire a la vie pelagique permanente
Provedor de dados: 16
Autores: Face, Louis.
Depuis longtemps certain aspect larvaire de nombreuses formes pélagiques faisant partie du plancton permanent a retenu l’attention des naturalistes et a conduit quelques-uns d’entre eux à considérer cette faune comme primitive. Si cette conclusion s’est par la suite avérée inexacte et si l’origine littorale de types planctoniques même les plus spécialisés, comme les Siphonophores par exemple (W. GARSTANG, 1946), a pu être mise en évidence, il n’en reste pas moins que cet aspect larvaire, qui avait frappé les premiers observateurs, demeure dans bien des cas évident. Sans doute, beaucoup de larves d’espéces benthiques mènent aussi, durant un temps plus ou moins long, une existence pélagique; et le fait que les constituants de ce plancton temporaire et du...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504019

Some new and rare Cleridae from Java and Sumatra
Provedor de dados: 16
Autores: Corporaal, J.B.
It is for me a pleasure to contribute the following descriptions of chosen rarities to the Jubilary Volume in honour of the highly esteemed Prof. Dr. L. F. DE BEAUFORT and Prof. Dr. J. E. W. IHLE, of the University of Amsterdam. I wish to express my gratitude to Dr. J. WILCKE, Wageningen, and to Mr. W. F. BREURKEN, Amsterdam, for the execution of the drawings.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504292

Pollenanalytisch en Geologisch onderzoek van het Onder- en Midden-Pleistoceen van Noord-Nederland
Provedor de dados: 16
Autores: Brouwer, A.
Pollen analytical and geological investigations of the Lower and Middle Pleistocene in the Northern Netherlands. The Pleistocene deposits in the northern part of the Netherlands, form through their extreme thickness up to more than 300 m, a promising object for study from the stratigraphical point of view. The boulder clay of the penultimate glaciation lies in the province of Drente at or near the surface, but in northerly and westerly directions it dips away beneath Upper Pleistocene and Holocene deposits. The Pleistocene deposits below this boulder clay form the subject of the present paper. In the first chapter the existing opinions regarding the stratigraphy are briefly reviewed. Van Cappelle (1888, 1891, 1892a, 1892b) and Lorié (1887a, 1893, 1899)...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/506021

Bindweefsel en stofwisseling
Provedor de dados: 16
Autores: Heringa, G.C.; Kroon, D.B.; Neumann, H.; Ruyter, J.H.C.
Bindweefsel is de naam van een familie van weefsels, welker gemeenschappelijke afkomst ligt in het mesenchym en welke tezamen gekarakteriseerd zijn door het bezit van meer of minder rijkelijke tussenstof tussen de cellen. Uit didactische overweging zijn we wel gewend de bindweefsels te onderscheiden in enerzijds zulke, welker functie in hoofdzaak bepaald wordt door de tussenstof, anderzijds zulks waarin de cellen de functiedraagsters zijn ¹). Als regel wordt dan vermeld, dat de eerstgenoemde groep (vezelbindweefsel, kraakbeen, been) in het organisme een mechanische taak vervult, terwijl de laatstgenoemde (reticulair bindweefsel, vetweefsel, bloed, weefsels, waarvoor de naam bindweefsel dus eigenlijk niet geldt) aandeel heeft in de stofwisseling. Dat deze...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504167

Research and exhibition in a museum
Provedor de dados: 16
Autores: Feen, P.J. van der.
If you ask the layman: “What is a museum?”, he will answer. “A museum is a display of objects, that have an aesthetic value or scientific interest; the scope of a museum is to improve the taste of the visitor, is to give him, by visual means, aesthetic or intellectual enjoyment, to satisfy his curiosity, to show him the true and real things (a classic sculpture, an Indian weapon or a deepsea fish) instead of a documentary film, a radio report, or the descriptions and pictures in his books and magazines.” If an architect is in charge of designing a museum, he will see to it that the wallcases and the free-standing objects receive the right light and that the public and the conditioned air can circulate freely. He will design an entrance hall, an exhibition...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504163

Enkele wetenswaardigheden uit de ontwikkelingsgeschiedenis der Amsterdamsche conbinatie: zoologisch laboratorium, zoologisch museum en zoologische tuin
Provedor de dados: 16
Autores: Sunier, A.L.J.
De uitgave door het Koninklijk Zoölogisch Genootschap Natura Artis Magistra van een aflevering zijner Bijdragen tot de Dierkunde ter gelegenheid van het bereiken in 1949 van den 70-jarigen leeftijd door de huidige directeuren van het Zoölogisch Laboratorium en van het Zoölogisch Museum te Amsterdam, welke gemeentelijke instellingen beide gelegen zijn in den tuin van het Genootschap en gehuisvest zijn in gebouwen, die oorspronkelijk aan het Genootschap behoorden, is een ongezochte aanleiding eenige niet algemeen bekende feiten te memoreeren uit de ontwikkelingsgeschiedenis der Amsterdamsche combinatie: zoölogisch laboratorium, zoölogisch museum en zoölogische tuin. Artikel 1 der eerste Wet van het Koninklijk Zoölogisch Genootschap Natura Artis Magistra,...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504048

On some fossil fish remains from Java
Provedor de dados: 16
Autores: Koumans, F.P.
During his paleontological searches in Java, the late Prof. Eug. Dubois collected a number of fossil fish remains. His searches were instituted mainly in pleistocene deposits, and as far as I am aware these fish remains were the first of their kind to be collected in Java in strata of that age. This, and the fact that Dubois (1907, 1908) referred to these fish in two preliminary papers, gives this collection additional interest. In the first of his preliminary papers, Dubois (1907, p. 455) mentions the following fish: Anabas microcephalus, Clarias magur, Ophiocephalus, Carcharias gangeticus. In the second paper, Dubois (1908, p. 1239) mentions that at least seven species of freshwater fish are represented in his collection, viz., Anabas microcephalus,...
Tipo: Article / Letter to the editor
Palavras-chave: 38.22; 42.81.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/319119

Der Abweichende Verlauf des Ductus arteriosus Botalli eines neugeborenen Hirsches
Provedor de dados: 16
Autores: Dam, A.J. van.
Im zoologischen Garten zu Amsterdam wurde am sechszehnten April 1939 von einer Hirschkuh der Art Rusa hippelaphus Cuv. ein Junges geworfen, das schon am anderen Tage wieder starb. Da dieses Tier nur einen Tag gelebt hatte, war ein bedeutender Ductus arteriosus Botalli mit ansehnlichem Lumen zu erwarten, wie er auch in Kälbern ziemlich lange nach der Geburt erhalten bleibt.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504232

Toegepaste wetenschap in de branding
Provedor de dados: 16
Autores: Swellengrebel, N.H.
De eisen die de practijk stelt zijn voor de toegepaste wetenschap de stimulans, welke de vragen die de werkhypothese suggereert voor de zuivere wetenschap zijn. Is aan die eisen voldaan dan loopt het onderzoek dood — tenzij de practijk aan het resultaat der onderzoekingen nieuwe eisen ontleent: naar analogie van een nieuwe hypothese steunend op feiten die men, geleid door een oudere hypothese, al eerder had opgespoord. Ik wil hiervan een voorbeeld geven: zowel van het doodlopen ener reeks onderzoekingen, als van haar resuscitatie. Het eerste stuk van mijn voorbeeld is bekend. Ik zal daar slechts zoveel van in herinnering brengen als voor het tweede stuk nodig is.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/503930

Himalayan glaciation and its effects on terrestrial and freshwater animal life in Peninsular India
Provedor de dados: 16
Autores: Hora, Sunder Lal.
One of the most remarkable features of the zoogeography of India is the occurrence of the so-called Malayan element in the freshwater and terrestrial fauna of the Indian Peninsula. This element is rich in species and genera of practically all groups of non-marine animals which are found in the hills of Peninsular India and Ceylon on the one hand and in the Eastern Himalayas, hills of Assam and Burma and Farther East on the other. The absence of this characteristic fauna from the rest of India and the present-day discontinuous distribution of a large assemblage of genera and species of Malayan affinities have attracted the attention of the naturalists for the last half a century or so. Geologists have used these distributional anomolies as collateral...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504100

La régénération de l’ours dans la forêt de Białowieża
Provedor de dados: 16
Autores: Karpiński, J.J.
Les données historiques conservées, touchant les ours de la Forêt de Bialowieża, sont assez rares. BOBROWSKIJ cite un cas qui eut lieu le 3 décembre 1705. Auguste II de Saxe, roi de Pologne, alla chasser l’ours à la lance (il s’agit d’une lance spéciale dont l’extrémité est formée par deux dents). Blessé par la lance l’ours se précipita sur le roi et le saisit dans ses pattes. Grâce à sa force extraordinaire et à son agilité, le chasseur échappa cependant à la mort.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504415

Revised list of the specimens of Conus gloria-maris Chemnitz in the collections of the world
Provedor de dados: 16
Autores: Feen-Van Benthem Jutting, W.S.S. van der.
Since F. Azpeitia Moros, in 1927 (Revista Acad. Cienc. Madrid, Vol. 23, 1927, p. 511—530), published his account of the specimens of Conus gloriamaris in public and private collections and in literature, many new and interesting details on the adventures of various individuals have come to my knowledge. This has led me to make systematic inquiries in the shell collections all over the world and, finally, to compile the following new survey of the representatives of this distinguished species. In spite of many efforts various particulars could not be found out; hence the author is well aware that the revision is not a final one. She hopes, however, that this contribution may serve to draw the attention of systematists and cabinet owners to this idol of...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504548

”Nomenclaturally extinct” works
Provedor de dados: 16
Autores: Baehni, Ch.; Holttum, R.E.; Robyns, W.; Steenis, C.G.G.J. van.
One of the causes of instability in botanical nomenclature is found in that our predecessors did not verify the nomenclatural bearing of an unknown number of (often very rare) works. In PENNANT’s 4-volume ”Outlines of the Globe” (1800), a standard geographical work at its time (1) a chapter was found recently devoted to a ”Flora Indica”. The compiler had unintentionally made some name changes which remained unrecorded in scientific botany. Not long ago ROTHMALER unearthed many such works (2). It must be realized that, quite probably, many other works will be detected necessitating future unexpected and undesirable name changes. Our proposal is to exclude, onwards of 1951, for botanical nomenclature, all works which, up till that date, have not been used...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/532814

Over een paar bizondere werken in de bibliotheek van het Koninklijk Zoölogisch Genootschap Natura Artis Magistra
Provedor de dados: 16
Autores: Scheffer, Joh.A.
Toen in 1881 door G. JANSE de Catalogus der Bibliotheek van het Koninklijk Zoölogisch Genootschap Natura Artis Magistra werd samengesteld, werden daarin opgenomen onder: N° 1202 Linnaei. C. Facsimile-reproductie van het vorige, (d.i. Systema Naturae sive Regna tria Naturae systematice proposita per Classes, Ordines, Genera et Species. Lugduni Batavorum. 1735. 7 bladen fol°, max.) (Berlijn.) 12 bl. fol°. max. N° 1203 Linnaei C. Methodus juxta quam Physiologus accurate et féliciter concinnare potest Historiam cujuscunque Naturalis Subjecti sequentt. hisce Paragraphis comprehensa. I. Nomina. II. Theoria. III. Genus. IV. Species. V. Attributa. VI. Usus. VII. literaria. Lugduni Batavorum. 1736. 1 bl. fol° max. Facsimile-reproductie van de oorspronkelijke...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504041

Amniogenesis
Provedor de dados: 16
Autores: Horst, C.J. van der.
At the seventh International Zoological Congres at Boston, HUBRECHT (1907) delivered an address “On the foetal membranes of the Vertebrates”. In this lecture he expounded his revolutionary ideas about the origin of the foetal membranes and the phylogenetic history of the vertebrates in general. HUBRECHT was of the opinion that in the ancestors of the Mammalia there was only one embryonic membrane, and that has been retained as the the trophoblast. Its original function was to protect the larva, but when, in the early mammals, intra-uterine development was established, this membrane assumed the function of feeding the embryo as we see in our present day mammals. In order to function properly a connection was then established with the embryonic vascular...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504498

Ouderdomsbepaling bij herten van het genus Rusa (voorlopige mededeling)
Provedor de dados: 16
Autores: Bemmel, A.C.V. van.
Wanneer men bij een systematisch onderzoek van herten tracht om de soortsen raskenmerken vast te stellen, stuit men op moeilijkheden van velerlei aard. Om te beginnen zijn herten sexueel dimorph en vertonen zij bovendien een duidelijke periodiciteit, die samenhangt met de sexuele cyclus. De laatste uit zich onder meer in het periodiek afwerpen en regenereren van het gewei, klieractiviteit e.d. Daarnaast komt, merkwaardig genoeg ook bij tropische soorten, een seizoensvariatie voor, die zich vooral uit in kleur en toestand van het haarkleed. De sexueel-cyclische variatie en de seizoensvariatie gaan bij de soorten in gematigde streken hand in hand, omdat daar de sexuele cyclus aan het seizoen gebonden is. Bij tropische soorten is dit in veel mindere mate het...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504086

Personal news
Provedor de dados: 16
Autores: NN.
Father G. Peekel died Febr. 19, 1949, in the Bismarck Arch. He is known as a plant collector since 1908 when he was stationed in the Bismarck Archipelago. In this Bulletin (p. 44) the rescue of his MS. Flora of the Bismarcks was announced. Many of his specimens formed the subject of contributions to Malaysian phytography (cf. ”Beiträge zur Flora Papuasiens” in Engler’s Bot. Jahrb. since 1912, and ”Plantae Peekelianae” by L. DIELS). Peekeliodendron SLEUMER, and numerous plant species commemorate his name. Prof. Dr R. Kanehira died at Tokyo on November 27th, 1948. During the Japanese occupation of Java he was Head of the Herbarium and of the Library (”Bibliotheca”) at Buitenzorg. See also under ”Miscellaneous”.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/533484

De biologie van Sisyphus schaefferi (L). (Coleoptera, Scarabaeidae)
Provedor de dados: 16
Autores: Piet, D.
Over de biologie van de kleine pillenkever, Sisyphus schaefferi (L.), zijn reeds verschillende mededelingen gedaan, die elkaar echter in vele opzichten tegenspreken. De kevers, die in Midden- en Zuid-Europa, Noord-Afrika en Klein-Azië voorkomen, kneden mestballen, welke ze ingraven en waarin het ei afgezet wordt. Hun lichaamsbouw is geheel aan het kneden en vervoeren van deze mestballen aangepast. De achter- en middenpoten zijn zeer lang, terwijl de voorpoten verkort en verbreed zijn.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504517

The genus Antemetula Rehder in the Indo- Westpacific area, with the description of two new fossil species
Provedor de dados: 16
Autores: Regteren Altena, C.O. van.
Rehder (1943: 199) pointed out, that Buccinum clathratum Adams &amp; Reeve, 1848, is the type of the genus Metula H.&amp; A. Adams, 1858. For the species congeneric with Buccinum metula Hinds, 1844, he proposed the generic name Antemetula, with that species as the type. Bucchium metula was described by Hinds from a specimen dredged by the Sulphur off the West coast of Veragua, at a depth of a few fathoms. There are no other records of the species from the American West coast. Smith (1904: 465) called attention to the fact that young specimens of Buccinum mitrella Adams &amp; Reeve, 1848, match Hinds’s figure of B. metula. B. mitrella was described from one or more specimens dredged by the Samarang in the China Sea, at a depth of 10 fathoms, and has been...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/503851

The Umbrella Bird
Provedor de dados: 16
Autores: Crandall, Lee S.
When CHARLES CORDIER arrived from Costa Rica on October 9, 1942, bringing with him, among other great rarities, three Bare-necked Umbrella Birds (Cephalopterus ornatus glabricollis), it seemed to us that the mere possession of such fabulous creatures was satisfaction enough. True, they were not beautiful — some realists have even gone so far as to name them “ugly” — and like all Cotingas, they were definitely dull. But in spite of all, they really were Umbrella Birds and if we could solve the problem of their long term requirements, they must reveal to us much that had been unknown. For only once before, as far as we can learn, has an Umbrella Bird been kept in captivity in either Europe or North America. According to a note by FRANK FINN in ‘Avicultural...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504418

Note on Tendipedidae of the Suez Canal
Provedor de dados: 16
Autores: Kruseman, G.
Mr. A. C. V. VAN BEMMEL and Dr. A. DIAKONOFF of the Buitenzorg Museum (Java) collected Tendipedidae, which were attracted by artificial lights, when they passed the Suez Canal on 8-XI-1937 and 16-V-1939 respectively. This very interesting collection, containing some new species, was sent to me for determination. I wish to express my sincere thanks to my two friends for the donation of this collection, which is now preserved in the Zoological Museum of Amsterdam.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504445

The Caridean Crustacea of the Canary Islands
Provedor de dados: 16
Autores: Holthuis, L.B.
The present paper is based mainly on material collected at the Canary Islands during the spring of 1947 by Dr. G. Thorson of Universitetets Zoologiske Museum at Copenhagen and Dr. C. O. van Regteren Altena of the Rijksmuseum van Natuurlijke Historie at Leiden. Most of the specimens were collected by Dr. Thorson, who devoted almost all of his time to the study of the litoral fauna, while Dr. Van Regteren Altena studied the inland fauna and only made occasional visits to the sea shore. The shrimp fauna of the Canary Islands is very poorly known. In 1839 Erulle, in the large work of Webb and Berthelot on the Natural History of the Canary Islands, listed 5 species of Caridea and since that time just two more species have been added to the list. The material...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/318604

List of co-operating Herbaria
Provedor de dados: 16
Autores: NN.
As was pointed out in the first instalment, the management of Flora Malesiana acknowledge collaborating and co-operating institutions; for this purpose a distinction was made between collaborators and co-operators. The former take an active part in the composition of the work (by revising certain families or large groups), the latter give assistance through the loan of specimens, information about collections, biblographical assistance etc.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/532965

Dates of publication of Malaysian phyto-taxonomical literature
Provedor de dados: 16
Autores: Wit, H.C.D. de.
Miquel, F.A.W., Illustrations de la flore de l’archipel Indien. 3 parts. 1870-1871. JACKSON (Guide 1881, p. 385) mentions this work, ”Flore de l’Archipel Indien”, as having been published 1870-’71. REHDER (Bradl. Bibl. 1, 1 (1909) 466) says that it contains X + 114 pp. 37 pl., and that it was published in 1871. He adds that another edition was published in 1874 containing 174 pp. Unbound copies in the original covers at the Rijksherbarium, Leyden, prove that these references are either incomplete or wrong.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/533157

Plio-Pleistocene Astartidae van de Zeeuwsche stranden
Provedor de dados: 16
Autores: Broek, A.N.Ch. Ten.
I. Inleiding. De tertiaire fossiele mollusken, die op de Zeeuwse stranden aanspoelen, hebben in de laatste jaren in steeds stijgende mate de belangstelling van talrijke malacologen getrokken. Nadat door verschillende auteurs in merendeels korte publicaties of naamlijsten reeds op het belang van deze fossielen ,,op secondaire vindplaats" was gewezen, verscheen in 1937 de bekende dissertatie van Van Regteren Altena. Hierin vinden wij voor het eerst een volledige soortenlijst van alle op de Zeeuwse stranden aanspoelende fossielen in systematische volgorde, waarbij nauwkeurig de verschillende vindplaatsen en de frequentie van het aanspoelen van de diverse soorten worden besproken. Belangrijk hierbij is dat Van Regteren Altena in zijn beschouwingen ook de...
Tipo: Article / Letter to the editor
Palavras-chave: 38.22; 42.73.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/318207

In vitro cultivation of malignant lymphoblasts of transplantable Mouse Lymphosarcoma MB (T 86157) without typical mesenchyme cells
Provedor de dados: 16
Autores: Bruyn, Willemina M. de.
Previous investigations (see Literature) by means of tissue culture methods have shown that the malignant lymphoblasts of mouse lymphosarcoma MB (T 86157) can be cultivated indefinitely when in the presence of actively growing mesenchyme cells. Under the cultural conditions provided, which included the use of low concentrations of embryo extract, a symbiotic relationship appeared to be established between the malignant lymphoblasts and the normal mesenchyme. It was also shown that media rich in embryo extract allowed only fibroblasts to proliferate. In the present article we wish to report some results of observations on the cultivation of the malignant lymphoblasts without the supporting mesenchyme.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504405

The distributional history of Coracina in the Indo-Australian Archipelago
Provedor de dados: 16
Autores: Voous, K.H.; Marle, J.G. van.
Recently RIPLEY (1941) has prepared a systematic revision of the Indo-Australian members of the genus Coracina (Cuckoo-Shrike), which for a considerable time had been in a state of great confusion. RYPLEY’s new arrangement represents a noteworthy step in the appreciation of the systematics of this difficult genus. Since only taxonomy and representative distribution have been taken into account by RIPLEY, resulting in the arrangement of 12 species into 3 superspecies and 7 isolated forms, certain problems still remain unsettled. It is the purpose of this paper to deal with some of these problems and to propose an arrangement of the Indo-Australian forms of Coracina not only in accordance with their taxonomy, but also with the history of their distribution....
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504280

Limnologische gegevens
Provedor de dados: 16
Autores: Vorstman, A.G.
Tijdens het directoraat van Prof. Dr. J. E. W. IHLE is mij op het Zoölogisch Laboratorium steeds vrijheid gelaten om bij de studenten belangstelling te wekken voor hydrobiologisch onderzoek. Hoewel de Hoogleraar IHLE dit onderdeel der biologie zelf niet beoefende, verleende hij hiervoor met grote bereidwilligheid alle materiële steun, waartoe de bescheiden middelen van het laboratorium hem in staat stelden. Wij beschikken thans dan ook over een kern van literatuur op hydrobiologisch gebied, waartoe niet weinig heeft bijgedragen de aankoop van de gehele separatencollectie van wijlen Dr. H. C. REDEKE, waarvoor de steun van de Vereeniging „Het Natuur- en Geneeskundig Congres” werd verkregen. Onder auspiciën van het Zoölogisch Laboratorium werden in de jaren...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504641

Ophioteresis beauforti nov. spec
Provedor de dados: 16
Autores: Engel, H.
1 specimen, Inhaca Island, Delagoa Bay near Lorenço Marques, coll. Prof. Dr. C. J. van der Horst. This animal closely resembles Ophioteresis elegans Bell, 1892 (Proc. Zool. Soc. London, p. 178, Pl. XI, Fig. 1—5) and Ophiothela tigris (Lyman, 1871, III. Catal. Mus. Comp. Zool. VI, p. 10 in Mem. Mus. Comp. Zool. Harvard Coll. II), both described more in detail by MORTENSEN, 1913 (Mindeskrift for Japetus Steenstrup, X, København). See also SOLLAS, 1914, in Phil. Trans. R. Soc. London, ser. B, vol. 204, Pl. 9, Fig. 2. It differs, however, in having the skin of the upper side of the arms covered by rough thorny nodules, while the smooth grains on the upper side of the disc occur here only between the large radial shields.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504334

De toepassing van isotopen in de dierphysiologie
Provedor de dados: 16
Autores: Vonk, H.J.
Steeds meer wordt in de biologische en medische wetenschappen gebruik gemaakt van isotopen als hulpmiddel bij het wetenschappelijk onderzoek. In het hier volgend artikel wordt getracht, aan de hand van enige voorbeelden, een inzicht te geven in hetgeen met deze methode te bereiken is in de dierphysiologie. Beginnen wij met een definitie te geven van het begrip isotoop. De chemische eigenschappen van een element worden bepaald door het aantal positieve ladingseenheden van de kern (overeenkomend met het aantal electronen dat om de kern wentelt). Dit aantal ladingseenheden is gelijk aan het aantal deeltjes met lading 1 en massa 1 (protonen), dat in de kern aanwezig is. De eenvoudigste kern, die van waterstof, bestaat uit slechts één proton. Behalve protonen...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504511

The Geology of the Bergamasc Alps Lombardia Italy
Provedor de dados: 16
Autores: Sitter, L.U. de; Sitter-Koomans, C.M. de.
In the Bergamasc Alps we have observed one major unconformity between the Basement rock and the overlying Permian. The total absence of any recognisable Palaeozoic sedimentary rocks accentuates this unconformity, and moreover this enormous hiatus makes the dating of any Palaeozoic event impossible. However, by comparison with the Central Alps and Kärnten, we learned that the Asturian orogenitic phase precedes the deposition of the first volcanic sediments. In analogy with the Aar and Gotthard masses we presumed the intrusion of the less metamorphic ortho rocks of the Basement, the granodiorite and the gneiss chiaro, to be of Upper Carboniferous age. The close resemblance of the chemical composition and differentiation of the Permian volcanic rocks and the...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/505987

Training a young Chimpanzee to attend to acoustic stimuli
Provedor de dados: 16
Autores: Bierens de Haan, J.A.
For certain reasons I wished to train a young chimpanzee to choose from two similar boxes the one characterised by the ticking of a metronome inside it. My subject was a young male chimpanzee (Pan leucoprymnus Lesson), approximately three years old, Tommy by name. He was a good-natured chap, quite tame, and already for some years in captivity. When we knew each other a little better, he would welcome me every morning with a hearty “uhuh”, as soon as he heard my steps, and after the experiments of the day we would take leave by shaking hands as old friends. Tommy was rather lazy and not so playful as most young chimpanzees, but this quality made working with him easier and more regular. With a few exceptions it did not give much trouble to make 50—60 trials...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504669

Copepods in Sunda Strait
Provedor de dados: 16
Autores: Delsman, H.C.
After having collected the plankton samples in the Java Sea on which I have reported in Treubia XVII, 1939, I thought it desirable to gather similar samples from a more oceanic area of the East Indian seas, in order to be able to make a comparison between the two collections and to try to find out the characteristic differences between the two regions. It seemed to me interesting to choose in the first place Sunda Strait for this purpose, as it connects the shallow Java Sea with the deep Indian Ocean and, therefore, might offer all degrees of transition from the plankton of the former to that of the latter. The next year, then, in 1933, I made a cruise in Sunda Strait in the months of April-May, the transition months between the (wet) west monsoon and the...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504054

Premarital behaviour in the Condor Sarcoramphus gryphus L
Provedor de dados: 16
Autores: Portielje, A.F.J.
As far as I know, little has been published and no thorough investigation has ever been made of the courting, mating, nesting, brooding and rearing of the Condor, though in some of the zoological gardens this largest and in many respects peculiar bird of prey sometimes most succesfully bred. In 1939, 1940 and 1942, a pair of Condors hatched in the gardens of the Royal Zoological Society “Natura Artis Magistra” in Amsterdam. They sat each time on one egg for 58 days alternately. In this way they brought up three young ones, the third of which, however, unfortunately lived only 12 days. It died 9 days after its mother’s death. Besides my preliminary notes in former years, annotations and protocolls were collected in 343 daily reports on this couple and its...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/503884

On maturation in the eggs of Limnaea stagnalis L
Provedor de dados: 16
Autores: Raven, Chr.P.
1. The maturation divisions of the egg of Limnaea stagnalis L. have been studied. 2. The haploid number of chromosomes is 18. 3. At the telophase of the first maturation division, the central group of dyads reaches the surface of the inner central body of the first maturation amphiaster. 4. This central body directly transforms into the second maturation spindle. 5. The aster surrounding this central body gradually disappears. New astral radiations are formed in the cytoplasm near the outer end of the newly formed second maturation spindle. 6. The spermaster, which appears during the telophase of the first maturation division, fuses secondarily with the inner end of the second maturation spindle and forms the inner aster of the second maturation...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504345

Annotated phyto-taxonomical &amp; phyto-geographical publications on or of importance to the Malaysian flora
Provedor de dados: 16
Autores: NN.
Baas Becking, L.G.M.: Notes on jungle trees I (Chron. Nat. 104, 1948, 271-277). Calculation of the age of the stand in the mountain forest reserve Tjibodas on Mt Gedeh, W. Java, by means of new measurements on the trees numbered by S.H. Koorders in 1890. By means of the losses (0.77% annually) the average life span of a tree is estimated at ca 130 years. Backer, C.A. c.s.: Beknopte Flora van Java (nooduitgave) afl. VII. Fam. XCLVIII-CLXXII. Rijksherbarium, Leiden. Sept. 1948. This instalment of the mimeographed emergency edition (in Dutch) contains the treatments of Meliaceae, Sapindaceae, Aceraceae, Sabiaceae, Staphyleaceae, Anacardiaceae, Connaraceae, Juglandaceae, Cornaceae, Alangiaceae, Nyssaceae, Araliaceae, Umbelliferae, Clethraceae, Ericaceae,...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/532951

Rhizopodes de Java
Provedor de dados: 16
Autores: Oye, Paul van.
Quelques années avant la guerre mon collègue le Professeur R. KOLKWITZ de Berlin m’a confié une série de 20 échantillons de matériel qu’il avait récolté à Java en octobre 1931. Je remercie ici bien vivement M. KOLKWITZ pour l’envoi de ces échantillons. La collection a déjà fait l’objet d’un travail de R. KOLKWITZ lui-même en collaboration avec W. KRIEGER. Le professeur KOLKWITZ en me confiant ce matériel m’a fait savoir que pour les indications des lieux et les données écologiques les numéros des échantillons correspondaient avec ceux de ce travail. Le petite collection d’échantillons s’est montrée d’une très grande importance pour notre connaissance des Rhizopodes de Java, dont les données sont encore très fragmentaires.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504380

Prof. Dr. J. E. W. Ihle
Provedor de dados: 16
Autores: Barendrecht, G.
Wanneer iemand een periode van zijn leven afgesloten ziet, tracht hij voor zichzelf een balans op te maken van de vervlogen jaren. Wanneer hij in die tijd een openbare functie heeft bekleed, zullen ook anderen dat doen. Voor die anderen is dat een moeilijke opgave, want is het schrijven van een necrologie al een moeilijke zaak, het schrijven over een nog levend man van karakter, die het zeker niet zal waarderen in zijn gezicht geprezen te worden, is nog oneindig moeilijker. Toch maak ik dankbaar van de gelegenheid gebruik om de figuur van den scheidenden professor IHLE tenminste voor één maal voor het voetlicht te halen, dat hij altijd zo graag heeft willen ontlopen. Mijn eerste herinnering dateert van begin October 1925, toen de nieuwbenoemde professor,...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504659

On Pleistocene remains of Ophicephalus from Java, in the "Collection Dubois"
Provedor de dados: 16
Autores: Boeseman, M.
When, in the fall of 1947, my predecessor, Dr. F. P. Koumans, suddenly withdrew from ichthyological research, some of the fossil fish-remains from Trinil, collected and partly examined by Prof. Dr. E. Dubois (1907; 1908), still remained to be investigated or re-examined. I gladly accepted the opportunity to complete the research on this interesting material. A considerable part of these fossil remains, labelled by Dr. Koumans (but not mentioned in his paper, 1948, p. 80) as "16 fragments of skullbones", which "probably belong to Ophicephalus spec." (no. 11640), still proved to be in a sufficient state of preservation to permit an accurate identification of the bones these fragments must represent, as well as of the kind of fish to which the greater part...
Tipo: Article / Letter to the editor
Palavras-chave: 38.22; 42.81.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/319431

Enkele notities over het Oever-aas van Nieuw Guinea (Ephem., Palingeniidae)
Provedor de dados: 16
Autores: Lieftinck, M.A.
Weinig onderzoekingen hebben in zo wijde kring bekendheid verworven als die van onze landgenoot JAN SWAMMERDAM, die in zijn ,Ephemeri vita’ (1675) en later in de ,Bybel der Natuur of Historie der insekten’ (1737) de ontwikkelingsgeschiedenis beschreef van het beroemd geworden Oever-aas, Palingenia longicauda (Oliv.), de grootste palaearctische Ephemeride. Dit allermerkwaardigst insect, dat — het zij terloops opgemerkt — reeds in 1634 door de Amsterdamse medicus AUGERIUS CLUTIUS was beschreven en afgebeeld ¹), moet destijds in ons land alom de aandacht hebben getrokken wegens zijn massaal optreden gedurende een aantal warme dagen omstreeks het midden van de maand Juni. In Nederland echter is dit grote haft vermoedelijk reeds tegen het eind van de vorige...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504443

Voorkomen en verspreiding der zoogdieren in de Noordoostpolder
Provedor de dados: 16
Autores: Dammerman, K.W.
Ofschoon een systematisch onderzoek naar het voorkomen en de verspreiding van zoogdieren in de Noordoostpolder niet heeft plaats gevonden, zijn de gegevens daarover, die in de afgelopen jaren bekend zijn geworden, toch wel van voldoende belang om in een publicatie vast te leggen. Over de zoogdierfauna van Urk en Schokland vóór de drooglegging staan ons maar zeer spaarzame opgaven ter beschikking. Schokland werd in 1933 door Utrechtse biologen bezocht en volgens mededeling van de heer M. F. MÖRZER BRUYNS werden toen in de omgeving van Middelbuurt huismuizen en bruine ratten aangetroffen. In 1940 is de heer MÖRZER BRUYNS begonnen met een hernieuwd onderzoek naar de zoogdierbevolking van Schokland en de N. O. polder, maar na het voorjaar 1941 kon hij zich...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504497

On some phenomena concerning pregnancy and parturition of the Cetacea
Provedor de dados: 16
Autores: Slijper, E.J.
1. A review is given of some phenomena concerning pregnancy and parturition of the Cetacea, depending on data in literature and on observations made in Antarctic Blue and Fin Whales on board the f.f. “Willem Barendsz” (1946—1947). 2. In Mystacoceti the frequency of twins appears to be less than in man and the big domestic animals. The majority of twins is born by females that are longer than the average female in the period of greatest sexual activity. This does not mean, however, that just as in man most twins are born at an elder age than that corresponding with the maximum of sexual activity. It may also be possible that, just as in the big domestic animals, the ages correspond, but that twins are mostly produced by the physically stronger developed...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/503926

Lieven Ferdinand de Beaufort
Provedor de dados: 16
Autores: Engel, H.
Een feestnummer ter ere van het bereiken van de 70-jarige leeftijd, een mijlpaal, en wel een zeer belangrijke mijlpaal in verband met het daaraan onafwendbaar verbondene emeritaat, verlangt een korte terugblik op alles wat tot nu toe bereikt werd, een verantwoording tevens van de aard dezer publicatie, die een hulde wil zijn van allen, die met de geleerde in aanraking kwamen, als collega’s in binnen- en buitenland, als leerlingen, als vrienden allen. LIEVEN FERDINAND DE BEAUFORT werd geboren de 23e Maart 1879 te Leusden, als zoon van den staatsman en historicus Mr. W. H. DE BEAUFORT. Reeds vroeg trok hem de natuur, die hem door zijn opgroeien op het buiten „Den Treek” bij Amersfoort zo nabij was. Na de H.B.S. te Amersfoort en het z.g. Staatsexamen in 1899...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504078

On the occurrence of fish remains in fossil and recent marine deposits
Provedor de dados: 16
Autores: Brongersma-Sanders, Margaretha.
The number of fish remains occurring in fossil marine deposits varies within wide limits. In many deposits they are rather scarce, sometimes even wholly absent, whereas in some deposits they are common or abundant. According to DEECKE (1913, p. 90) they are scarce in many mesozoic marls, and they are wanting even completely in the devonian Helderberg and Oriskany beds and in the jurassic Opalinus and Renggeri clays. The deposits with a. great number of fish remains are divided by DEECKE into different groups. (The groups that refer to brackish and to supersaline water I shall leave out of consideration). The most important group is represented by certain finegrained sediments that probably were deposited near to the shore; very often these are shales...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504435

More light upon the problem of the Oyster’s nutrition
Provedor de dados: 16
Autores: Korringa, P.
Modern oyster culture began its development in the second part of the nineteenth century. Beginning in Europe it gradually spread over all the world’s oyster regions. Locally oyster cultural methods acquired a high degree of technical specialisation, recently even including chemical control of oyster diseases. A steadily increasing stream of scientific and technical papers, dealing with oyster biology and oyster culture, accompanied this development, and already numbers several thousands of publications. If closely related industries, such as cattle-breeding, horticulture, and agriculture, are compared with it, it is clear that one of the basic problems of oyster culture must be the oyster’s nutrition. Without a detailed knowledge of this subject it seems...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504315

Notes on synonymy of some South Asiatic Microlepidoptera
Provedor de dados: 16
Autores: Diakonoff, A.
The following notes on new synonymy of the species of South Asiatic Microlepidoptera of the families Tortricidae, Phaloniidae, Eucosmidae and Glyphipterygidae were made during a visit to the British Museum, Natural History, London, in 1946 and chiefly concern the material in the extensive collection of the late E. MEYRICK. A few additional new synonyms of Eucosmidae and of Carposinidae are not included and will be dealt with in another place. We are greatly obliged to the Trustees of the British Museum for the opportunity to study these collections, and also to Mr. W. H. T. TAMS, of the Division of Lepidoptera of that Museum, for his kind help and suggestions.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504373

Migration in birds and fishes
Provedor de dados: 16
Autores: Verwey, J.
Our knowledge concerning the periodical movements in animals called migrations is chiefly based on observations on birds. By and by, however, a number of facts concerning migration in other animal groups have been assembled and it seems worth while to compare them with those known for birds. There is the more reason to do so here, because the victim of this jubilee is interested in birds and fishes alike. Though I shall not restrict myself to these two groups they will take more place than the rest. In the following I shall deal with North to South and South to North migrations chiefly. In the hope to succeed and make my ideas comprehensible to those who are not specially acquainted with this particular field I shall begin with a very short description of...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504069

Note on the Zuiderzee Crab, Rithropanopeus harrisii (Gould) subspecies tridentatus (Maitland)
Provedor de dados: 16
Autores: Buitendijk, A.M.; Holthuis, L.B.
In the former Zuiderzee, the large brackish inland sea of the Netherlands, a species of crab was commonly met with, which species generally was considered to be endemic in the Dutch inland waters, and was named by most authors Heteropanope tridentata (Maitland). Examination of material and literature convinced us that the crab does not belong to the genus Heteropanope at all, but is a Rithropanopeus, while it is so closely related to the American Rithropanopeus harrisii (Gould), that we only can consider it to be a subspecies of that species. The synonymy of the Dutch form is as follows: Pilumnus tridentatus Maitland, 1874, Tijdschr. Nederl. dierk. Ver., vol. 1, p. 232. non Pilumnus tridentatus Maitland, 1876, Tijdschr. Nederl. dierk. Ver., vol. 2, p. 11....
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/318557

Some new and rare Copepoda Calanoida from East Indian Seas
Provedor de dados: 16
Autores: Vervoort, W.
The rich material of Copepods collected by the Snellius Expedition in the seas of the Eastern part of the Malay Archipelago was placed at my disposal in 1943 by Prof. Dr. H. Boschma. The material proved to be very interesting and contained, besides new species, many rare forms found for the first time in the Indo-pacific area. A report on the families Calanidae, Eucalanidae, Paracalanidae, and Pseudocalanidae will be published in Temminckia, vol. VIII, pp. 1-181. A report on the family Aetideidae was completed in 1946 but, as the printing difficulties created by the war have not yet sufficiently improved to warrant the publication of this report within a short time, it seems desirable to publish a preliminary account of some new or interesting forms....
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1949
URL: http://www.repository.naturalis.nl/record/317660

De geografische variabiliteit van Philudoria potatoria L. in Nederland (Lepidoptera, Lasiocampidae)
Provedor de dados: 16
Autores: Lempke, B.J.
1. The caterpillars of Philudoria potatoria. L. belong in Holland to two phaenotypes, a light one with a pale bluish-grey ground colour, strongly mottled with pale markings (figured in SEPP 1), and a dark one, which is nearly blackish blue and much less provided with pale markings (figured in practically all text books). 2. The pale caterpillars are confined to reedbeds in the lower western part of the country, the dark caterpillars principally to coarse grasses (e. g. Dactylis) in the higher parts (east and south). Mixed colonies are also known. See map. 3. It is highly probable that the colour forms of the caterpillars are due to environmental factors. From 37 light caterpillars collected in one colony in 1948 about half of them turned to dark ones in...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504261

Enige hydrobiologische waarnemingen op Vlieland
Provedor de dados: 16
Autores: Vos, A.P.C. de.
In Juni 1947 werden door mij in enige plasjes in de bosaanplant aan de Z.O.-kant van het eiland, in slootjes tussen de diverse bospercelen en in enige watertjes aan de Westkant (geen eendenkooien!) monsters genomen en wel op de volgende plaatsen: i. Ijsbaan achter het dorp Oostvlieland, 10 VI 2. Plasje in het bos, ten Z. van het schelpenpad langs de Weekend-huisjes, 10 VI 3. Visvijvertje, vlak bij vorig plasje, 10 VI 4- Plasjes bij Vliehors, ten Z. van de grote weg-, li VI 5. Plasje ten Z. van de grote weg iets meer naar Bomenland, 11 VI 6. Gat gevuld met water in hei achter Bomenland, 11 VI 7. Slootje langs het fietspad naar Vianen, Z-kant, 11 VI 8. Vijvertje bij bank V.V.V. in buurt van Vuurtoren, 13 VI 9. Idem 10. Slootje langs bospad, uitlopend op...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504500

Miscellaneous information
Provedor de dados: 16
Autores: NN.
Prospects for an Indonesian Agar-agar Industry. – An Indonesian agar-agar industry seems possible. Seaweeds containing a sufficient percentage of agar-agar to make them eligible for industrial purposes, are found in suitable quantities in Indonesian waters. Dr J. S. Zaneveld, the recently arrived algologist of the Buitenzorg Herbarium (cf. p. 85), is at present at Batavia occupied in collecting scientific and practical data in view of a future industrial development of these natural resources. Dr Ch.J. Bernard, is Chairman of the new established Union Internationale pour la Protection de la Nature residing at Brussels, Rue Montoyer, 42. We are sure that the fast disappearing autochthonous fauna and vegetation of Indonesia will receive all possible attention.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/533412

Relexions au sujet de la blastogénèse
Provedor de dados: 16
Autores: Brien, Paul.
Si l’on caractérise un mode de bourgeonnement par l’élément blastogénétique le plus important, on peut distinguer divers types de blastogénèse chez les Ascidiacés.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504602

The existence of an aestuarine fishfauna in South East Asia
Provedor de dados: 16
Autores: Hardenberg, J.D.F.
Before the outbreak of the war with Japan the author had the intention to publish an extensive account on the occurrence of an aestuarine fishfauna in and in front of the large aestuarines and river-mouths so often found in India, Burma, Malaya, Thailand and Indo China and in the Greater Sunda Islands, Sumatra and Borneo, the rivers of the latter two islands being the special field of investigation. However as a consequence of the war all, thus far, unpublished notes and the greater part of the collections were lost as is the case with a most interesting sample of an aestuarine fishfauna from South New Guinea, where biologically the same conditions exist as in Sumatran and Bornean rivermouths. This last collection remained partly unpacked when war broke...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504621

Bijdrage tot de kennis van de avifauna van Curaçao en Bonaire
Provedor de dados: 16
Autores: Oordt, G.J. van.
Hoewel ik in het voorjaar van 1948 slechts korte tijd op Curaçao en Bonaire verbleef, deed ik hier naast waarnemingen, die een bevestiging zijn van die van RUTTEN (1931), ook een aantal aanvullende observaties. Ik wil deze gaarne publiceren in de feestbundel ter ere van Prof. Dr. J. E. W. IHLE en Prof. Dr. L. F. DE BEAUFORT, met wie ik gedurende vele jaren op verschillend gebied zo aangenaam samengewerkt heb. Over de vogels der Benedenwindse Eilanden is nog slechts weinig geschreven. Eigenlijk bestaat er slechts één goed artikel en wel dat van RUTTEN (1931), die hierin niet alleen oude mededelingen van HARTERT en van CORY verwerkte, maar ook tal van nieuwe, eigen waarnemingen, deels van veldornithologische aard, mededeelde. De lijst van DE JONG (1948) is...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/503916

The First Fifty Years of Agriculture in New South Wales
Provedor de dados: 31
Autores: King,   C.J.
Tipo: Journal Article
Palavras-chave: Agribusiness.
Ano: 1949
URL: http://purl.umn.edu/8925

The First Fifty Years of Agriculture in New South Wales
Provedor de dados: 31
Autores: King,   C.J.
Tipo: Journal Article
Palavras-chave: Agribusiness.
Ano: 1949
URL: http://purl.umn.edu/8686

Book Review
Provedor de dados: 31
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1949
URL: http://purl.umn.edu/9066

Contents Pages
Provedor de dados: 31
Tipo: Journal Article
Ano: 1949
URL: http://purl.umn.edu/8687

Butte County, Agricultural Commissioners’ Crop Reports, 1939-1949
Provedor de dados: 31
Includes individual reports from each year for 1939-1949.
Tipo: Report
Palavras-chave: Agriculture; Statistics; Crop Production/Industries.
Ano: 1949
URL: http://purl.umn.edu/56306

Some Notes on the Financial Position of 15 Central-Western Wheat-Sheep Farms in 1946-47
Provedor de dados: 31
Autores: Druce,   P.C.
The financial year which ended 30th June, 1947, was the fourth year in which a group of selected wheat growers kept complete records of their financial transactions in co-operation with, and in Record Books provided by, the Division of Marketing and Agricultural Economics. Reports covering the records kept in 1944-45 and 1945-46 have already been published in this "Review".  The notes which follow deal primarily with the financial position of the fifteen farmers who kept records during 1946-47. However, some comparisons with earlier years are made.
Tipo: Journal Article
Palavras-chave: Farm Management.
Ano: 1949
URL: http://purl.umn.edu/9064

The First Fifty Years of Agriculture in New South Wales; 12 - "The Finding of a Staple" - The Early Development and Later Problems of the Grazing and Fine Wool Industry (Circa 1803-1842)
Provedor de dados: 31
Autores: King,   C.J.
Tipo: Journal Article
Palavras-chave: Livestock Production/Industries.
Ano: 1949
URL: http://purl.umn.edu/9063

Editorial - Research in Agricultural Economics
Provedor de dados: 31
Tipo: Journal Article
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1949
URL: http://purl.umn.edu/8928

Colusa County, Agricultural Commissioners’ Crop Reports, 1928-1949
Provedor de dados: 31
Includes individual reports from each year for 1928-1949 (1929, 1931-1937, 1941-1944 not issued, 1938 not available).
Tipo: Report
Palavras-chave: Agriculture; Statistics; Crop Production/Industries.
Ano: 1949
URL: http://purl.umn.edu/56367

Editorial - Movement of Farm Population
Provedor de dados: 31
Tipo: Journal Article
Palavras-chave: Labor and Human Capital.
Ano: 1949
URL: http://purl.umn.edu/9068

Annual Report of the Farm Management Service for Veterans Taking On-the-Farm Training in Northeastern Minnesota 1948
Provedor de dados: 31
Autores: Nodland,   Truman R.; Pond,   George A.; Stanton,   Bernard F.
Tipo: Report
Palavras-chave: Farm Management.
Ano: 1949
URL: http://purl.umn.edu/109356

Santa Clara County, Agricultural Commissioners’ Crop Reports, 1940-1949
Provedor de dados: 31
Includes individual reports from each year for 1940-1949.
Tipo: Report
Palavras-chave: Agriculture; Statistics; Crop Production/Industries.
Ano: 1949
URL: http://purl.umn.edu/99346

Editorial - Falling Farm Incomes
Provedor de dados: 31
Tipo: Journal Article
Palavras-chave: Farm Management.
Ano: 1949
URL: http://purl.umn.edu/8683

Book Reviews
Provedor de dados: 31
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1949
URL: http://purl.umn.edu/8682

ANNUAL REPORT OF THE SOUTHWESTERN MINNESOTA FARM MANAGEMENT SERVICE 1948
Provedor de dados: 31
Autores: Nodland,   Truman R.; Pond,   George A.
Tipo: Working or Discussion Paper
Palavras-chave: Farm Management.
Ano: 1949
URL: http://purl.umn.edu/13123

Some Notes on Farm Power Usage and Costs on Dairy Farms in The South Coast Milk Board Area
Provedor de dados: 31
Autores: Druce,   P.C.
The mechanisation of the dairy industry in New South Wales has proceeded gradually over the past fifty years; however, the rate of increase in the use of mechanised equipment during that period has been far from uniform. The introduction of milking machines at the turn of the century resulted in the first significant use of machinery in the dairy industry. Prior to 1900 the quantity and value of machinery on dairy farms was almost negligible, but by 1920 dairy machinery was valued at almost £1 million, the value having doubled between 1900 and 1910, while between 1910 and 1920 it almost doubled again. Nevertheless, during the twenties the use of machinery did not continue to expand at such a rapid rate as during the years prior to 1920, and with the onset...
Tipo: Journal Article
Palavras-chave: Livestock Production/Industries; Resource /Energy Economics and Policy.
Ano: 1949
URL: http://purl.umn.edu/8690

Contents Page
Provedor de dados: 31
Tipo: Journal Article
Ano: 1949
URL: http://purl.umn.edu/9065

Contents Page
Provedor de dados: 31
Tipo: Journal Article
Ano: 1949
URL: http://purl.umn.edu/8924

Farm Size and Factors Influencing Changes in Farm Size With Particular Reference to New South Wales (1900-1948)
Provedor de dados: 31
Autores: Gruen,   Fred H.G.
Tipo: Journal Article
Palavras-chave: Farm Management; Land Economics/Use.
Ano: 1949
URL: http://purl.umn.edu/8926

Editorial - Production for an Increasing Population
Provedor de dados: 31
Tipo: Journal Article
Palavras-chave: Production Economics.
Ano: 1949
URL: http://purl.umn.edu/8691

Annual Report of the Farm Management Service for Veterans Taking On-the-Farm Training in Northwestern Minnesota
Provedor de dados: 31
Autores: Nodland,   Truman R.; Pond,   George A.
Tipo: Report
Palavras-chave: Farm Management.
Ano: 1949
URL: http://purl.umn.edu/106982

The First Fifty Years of Agriculture in New South Wales; Appendices
Provedor de dados: 31
Tipo: Journal Article
Palavras-chave: Agribusiness.
Ano: 1949
URL: http://purl.umn.edu/8689

Book Reviews
Provedor de dados: 31
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1949
URL: http://purl.umn.edu/8685

The First Fifty Years of Agriculture in New South Wales
Provedor de dados: 31
Autores: King,   C.J.
Tipo: Journal Article
Palavras-chave: Agribusiness.
Ano: 1949
URL: http://purl.umn.edu/8927

Annual Report of the Farm Management Service for Veterans Taking on-the-Farm Training in Southeastern Minnesota 1948
Provedor de dados: 31
Autores: Nodland,   Truman R.; Pond,   George A.; Stanton,   Bernard F.
Tipo: Report
Palavras-chave: Farm Management.
Ano: 1949
URL: http://purl.umn.edu/106059

Report on Coastal-Grown Orange Prices: An Interpretation of Market Trends and the Conditions of Retail Distribution
Provedor de dados: 31
Autores: King,   C.J.; McKeon,   T.M.P.
Tipo: Journal Article
Palavras-chave: Demand and Price Analysis.
Ano: 1949
URL: http://purl.umn.edu/8680

The First Fifty Years of Agriculture in New South Wales
Provedor de dados: 31
Autores: King,   C.J.
Tipo: Journal Article
Palavras-chave: Agribusiness.
Ano: 1949
URL: http://purl.umn.edu/8679

The Navy Bean Industry in New South Wales
Provedor de dados: 31
Autores: Furby,   E.B.; Yorke,   Leo C.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 1949
URL: http://purl.umn.edu/9069

Contents Page
Provedor de dados: 31
Tipo: Journal Article
Ano: 1949
URL: http://purl.umn.edu/8681

Sonoma County, Agricultural Commissioners’ Crop Reports, 1930-1949
Provedor de dados: 31
Includes individual reports from each year for 1930-1949.
Tipo: Report
Palavras-chave: Agriculture; Statistics; Crop Production/Industries.
Ano: 1949
URL: http://purl.umn.edu/99823

ANNUAL REPORT OF THE SOUTHEASTERN MINNESOTA FARM MANAGEMENT SERVICE 1948
Provedor de dados: 31
Autores: Nodland,   Truman R.; Pond,   George A.
Tipo: Working or Discussion Paper
Palavras-chave: Farm Management.
Ano: 1949
URL: http://purl.umn.edu/13125

Tulare County, Agricultural Commissioners’ Crop Reports, 1941-1949
Provedor de dados: 31
Includes individual reports from each year for 1941-1949.
Tipo: Report
Palavras-chave: Agriculture; Statistics; Crop Production/Industries.
Ano: 1949
URL: http://purl.umn.edu/99946

Annual Report of the Farm Management Service for Veterans Taking On-the-farm Training in Southwestern Minnesota 1948
Provedor de dados: 31
Autores: Nodland,   Truman R.; Pond,   George A.
Tipo: Journal Article
Palavras-chave: Farm Management.
Ano: 1949
URL: http://purl.umn.edu/47789

The Seventh International Conference of Agricultural Economists
Provedor de dados: 31
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1949
URL: http://purl.umn.edu/8688

The First Fifty Years of Agriculture in New South Wales; 11 - The Problem and Failure of Small Land Settlement (Circa 1788-1821)
Provedor de dados: 31
Autores: King,   C.J.
Tipo: Journal Article
Palavras-chave: Agribusiness; Land Economics/Use.
Ano: 1949
URL: http://purl.umn.edu/9067

The First Fifty Years of Agriculture in New South Wales - Some Agricultural Problems and Economic Controversies of the 1820's
Provedor de dados: 31
Autores: King,   C.J.
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1949
URL: http://purl.umn.edu/8242

The Financial Resources and Earnings of Beginning Farmers
Provedor de dados: 31
Autores: McDaniel,   William E.; Vanvig,   Andrew; Nodland,   Truman R.
Tipo: Journal Article
Palavras-chave: Agricultural Finance.
Ano: 1949
URL: http://purl.umn.edu/47920

San Luis Obispo County, Agricultural Commissioners’ Crop Reports, 1936-1949
Provedor de dados: 31
Includes individual reports from each year for 1936-1949.
Tipo: Report
Palavras-chave: Agriculture; Statistics; Crop Production/Industries.
Ano: 1949
URL: http://purl.umn.edu/99309

Características morfológicas, anatômicas e ortológicas da epiderme inferior da fôlha das Rubiaceae
Provedor de dados: 43
Autores: Accorsi,Walter Radamés.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100003

Carvão da cana
Provedor de dados: 43
Autores: Carvalho,Ruben de Sousa.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100001

Uma nova (?) fórmula para o cálculo de rações
Provedor de dados: 43
Autores: Torres,A. P.
Visando a obtenção dum método fácil e rápido para calcular rações para animais, o Autor deduz e apresenta uma fórmula que dará a quantidade dum alimento a ser acrescentada a uma mistura para balanceá-la. Sugere a necessidade de tabelas apropriadas para facilitar o uso da fórmula.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100013

Raça de galinhas "piracicaba": II. "Pedigree" das aves puras para os caracteres pescoço pelado e plumagem preta
Provedor de dados: 43
Autores: Graner,E. A.; Torres,A. P.
The pedigree of chickens homozygous for black plumage and naked and now obtained in the Poultry Department of the "Luiz de Queiroz" School of Agriculture, was traced in this paper. The animals will be used in the formation of the new local breed called "Piracicaba PPPP", (Pescoço Pelado Preta de Piracicaba), which we propose to start with selection of others morphological characters and mainly the economical ones: egg laying, early maturing and soft-meated chickens.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100006

Retardamento da brotação das batatas durante a armazenagem
Provedor de dados: 43
Autores: Montenegro,Heitor W. S.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100005

Causas da Floração: aula inaugural de 1949
Provedor de dados: 43
Autores: Tricânico,Silvio.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100017

A influência dos pigmentos de vários alimentos na coloração da gema do ôvo de galinha
Provedor de dados: 43
Autores: Graner,E. A.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100012

Aspectos Matemáticos e Estatísticos da Lei de Mitscherlich
Provedor de dados: 43
Autores: Gomes,Frederico Pimentel; Malavolta,Eurípedes.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100016

O desenvolvimento em série e a derigração das funções tan. x e cot. x.
Provedor de dados: 43
Autores: Gomes,Frederico Pimentel.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100004

Ensaio da época de plantio de estacas de marmeleiro
Provedor de dados: 43
Autores: Soubihe Sobrinho,J.; Montenegro,Heitor W. Studart.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100014

Experiências de engorda de frangos
Provedor de dados: 43
Autores: Torres,A. P.; Trivelin,A. P.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100010

Sobre o comportamento mitótico e meiótico de cromossomas policêntricos ou com ponto de inserção difuso
Provedor de dados: 43
Autores: Brieger,F. G.; Kerr,Warwick E.
Material: Studies were made mainly with Ascaris megalocephála Cloq. univalens and bivalens, and also with Tityus bahiensis Perty. 1) Somatic pairing of heterochromatic regions. The heterochromatic ends of the somatic chromosomes in Ascaris show a very strong tendency for unspecifical somatic pairing which may occur between parts of different chromosomes (Figs. 1, 2, 3, 7, 10, 11, 12, 13, 14, 16, 18,), between the two ends of the same chromosome either directly (Figs. 4, 5, 7, 8, 11, 12, 13, 15, 16, 17, 18) or inversely (Fig. 8, in the arrow) and also within a same chromosomal arm (Fig. 6). 2) During the early first cleavage division the chomosomes are an isodiametric cylinder (Figs. 6, 9, 11, 13, 14). But in later metaphase the ends become club shaped...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100015

Algumas observações sôbre adubações de Citrus
Provedor de dados: 43
Autores: Vasconcellos,Philippe Westin Cabral de.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100002

Um método prático de racionamento das aves domésticas
Provedor de dados: 43
Autores: Torres,A. P.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100011

Alimentação dos marrecos: III sôro de leite (Líquido)
Provedor de dados: 43
Autores: Trivelin,A. P.
The author studied in this paper the influence of liquid whey in feeding Pekin ducklings. Wet mash, either by liquid whey or water, was given to the ducklings during the whole day. Green feed was added to the ration just once a day. The statistical analysis did not show significant differences between the use of water and liquid whey but the results obtained with wet mash proved to be statistically better than the results obtained with dry mash.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100009

Raça em formação de galinhas de plumagem azul e ovos azuis
Provedor de dados: 43
Autores: Graner,E. A.; Torres,A. P.
This paper deals with the inheritance of black, blue and blue-splashed plumage in poultry. The material analysed had its origin in the State of Goias, Brazil and the genetical data seems to indicate the interaction of a single pair of genes as in the Andalusian fowls and other blue breeds. The dominant gene for blue egg is also present in the material and selection is now being directed to isolate a breed with blue plumage and blue eggs, named "Tudo Azul", what in Portuguese means all blue (plumage and eggs) and corresponds, in braziliian slang, to the expression "O. K." used in the United States. The commercial possibility of the chickens, as judging by its, laying capacity, is emphasized.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100007

Observações sôbre a quantidade de milho amarelo necessária para prevenir a avita-minose a em pintos
Provedor de dados: 43
Autores: Graner,E. A.; Bergamin,A.
The authors tried to check in this experiment the minimum of yellow corn necessary for preventing avitaminosis A in chickens. It was observed, in balanced ration with 50% of corn, that: a) 20% of dent and yellow grains and 30% of flint and white grains were insuficient to prevent avitaminosis A. b) 20% of flint and orange grains and 30% of flint and white grains or 40% of either colored grains and 10% of flint, and white grains did not show evident signs of avitaminosis A during the 12 weeks of the experiment. The ration containing 20% of flint and orange grains is pratically equivalent to the ration containing 40% of dent and yellow grains, regarding the content of pro-vitamina A. However, it was not possible to conclude if these dosage are sufficient to...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100008

Observações citológicas em Coffea: XII - Uma nova forma tetraplóide
Provedor de dados: 53
Autores: Mendes,A. J. T.
Um cafeeiro muito rústico e altamente produtivo, encontrado em uma propriedade agrícola do Estado de São Paulo, revelou ser tetraplóide (2n=44). Neste particular êle se assemelha à espécie C. arabica ; porém, em sua auto-esterilidade, se aproxima das espécies diplóides (2n = 22) de café. Imaginou-se, a princípio, que se tratava de uma forma tetraplóide espontânea de C. liberica ou de C. Dewevrei. O estudo aqui apresentado, porém, conduz à conclusão de que se deve tratar de um híbrido entre C. arabica e C. Dewevrei. No estudo da microsporogênese verificou-se a formação de uni- e bivalentes e mais raramente de tri- e tetravalentes. Supondo que o complemento cromossômico desta planta seja constituído de 22 cromossômios arabica haplóides e 22 cromossômios...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000100003

Agentes de polinização da flor do cafeeiro (Coffea arabica L
Provedor de dados: 53
Autores: Carvalho,A.; Krug,C. A.
This paper describes the methods used and presents an analysis of the results obtained from three years of study, to determine the separate and inter-related effects of various agents such as gravity, wind and insects, in the pollination of flowers of Coffea arabica L. Observations were made and data obtained from several thousands of normal and castrated flowers that were maintained under natural and controlled conditions. It has been found that the importance of gravity, wind, and insects in pollination of the flowers may vary appreciably in relation to local environmental influences. The data obtained, however, indicate certain trends that are of definitive interest. Based on the total number of ovules, it was found that in 1228 normal flowers observed,...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000100002

Análise estatística do ensaio de variedades de café
Provedor de dados: 53
Autores: Stevens,W. L.
This paper describes the statistical analysis of a varietal trial with two unusual characteristics : (i) The plant (coffee) is one of those which show strong maxima and minima of production in alternate years. This phenomenon must be prevented from masking or biasing the other varietal comparisons in which we are interested. (ii) The design of the experiment is systematic. It was laid down in Campinas, Brazil, in 1933 at a time when the principles of randomisation were not so widely known as they are today. THE EXPERIMENT AND DATA. Six varieties are compared, denoted by A B C D E and F (see page 104). They are planted in thirty rows, each with 50 plants, according to the systematic design : A B C D E F A B C D E F A B C D E F A B C D E F A B C D E F Data...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000200002

Taxonomia de Coffea arabica L.: II - Coffea Arabica L. Var. Caturra e sua forma Xanthocarpa
Provedor de dados: 53
Autores: Krug,C. A.; Mendes,J. E. T.; Carvalho,A.
Uma nova variedade de Coffea arabica L., provavelmente originária de Manhumirim, Estado de Minas Gerais, e cultivada em pequena escala no Estado do Espírito Santo, foi recebida, pelo Instituto Agronômico de Campinas, em 1937. Trata-se da variedade caturra. Carateriza-se por apresentar porte menor do que o da variedade bourbon, da qual provàvelmente se originou. Os internódios são bem curtos, tanto no caule como nos ramos, sendo intensa a ramificação secundária e de ordem inferior. As fôlhas são de um verde bem escuro, maiores e proporcionalmente mais largas do que as do Bourbon. As flores são pouco menores e os frutos e sementes um pouco maiores do que as dessa variedade. No presente trabalho apresentam-se os resultados das pesquisas taxonômicas relativas...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000300001

Ensaio de variedades de cafeeiros II
Provedor de dados: 53
Autores: Mendes,J. E. Teixeira.
An experiment was started in 1931 for the purpose of making a comparative study of the productivity of following varieties of Coffea arabica L, : Nacional (Coffea arabica L. var. typica Cramer) Amarelo de Botucatu (Coffea arabica L. var. typica Cramer forma xanthocarpa (Caminhoá) Krug) Bourbon (Coffea arabica L. var. bourbon (B. Rodr.) Choussy) Bourbon amarelo (Coffea arabica L. var. bourbon (B. Rodr.) Choussy forma xanthocarpa Krug) Sumatra (Coffea arabica L. var. typica Cramer) Maragogipe (Coffea arabica L. var. maragogipe Hort. ex Froehner) The results obtained from this experiment for the period 1935-1938 have been the subject of a previous publication. The present paper concerns results obtained from the same experiment for the period 1939-1946. The...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000200001

Determinação do potencial biótico da "broca do café": Hypothenemus Hampei (Ferr.) - E considerações sôbre o crescimento de sua população. III - Curva termometabólica da "broca do café" e sua aplicação no estudo do crescimento de sua população
Provedor de dados: 53
Autores: Mendes,Luiz O. T.
Lançando mão de dados publicados por outro autor, (1) sôbre o comportamento da "Broca do Café", quando criada a várias temperaturas, em laboratório, o autor, aceitando em princípio que uma hipérbole equilátera traduz o termometabolismo da espécie, calcula a constante térmica da espécie (K = 339,26) e determina a sua temperatura mínima efetiva (T0 =15,12 °C). É deduzida a equação termometabólica para êsse inseto, dada por D = 339,26 / (T-15,12). Considerando que, num cafèzal, a temperatura do ar não é constante, variando de acôrdo com a estação do ano, o autor pondera que a curva de crescimento de uma população de "Broca do Café" será melhor representada em gráfico onde seja levada em conta a influência da temperatura no desenvolvimento do ciclo biológico...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000300007

Sistemas coletores para determinações de perdas por erosão
Provedor de dados: 53
Autores: Bertoni,José.
No estado de São Paulo a erosão é ocasionada, em grande parte, pelas águas das chuvas. Estas, desagregando o solo, arrastam sua parte mais útil, levando quantidades consideráveis de sais minerais e de matéria orgânica. Daí o grande interesse de se avaliar, por meio de sistema coletores, as perdas pela erosão, a fim de se determinar quais as práticas conservacionistas mais eficientes nos vários tipos de solo e modalidades de cultivo. Em São Paulo, o primeiro dêsses sistemas coletores foi instalado, pela Secção de Conservação do Solo, em 1944, na Estação Experimental de Pindorama, seguindo-se, logo depois, a instalação de outros em Campinas, Mococa e Ribeirão Prêto. O objeto do presente trabalho é o de apresentar os vários métodos para medição de enxurrada....
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000200005

Determinação do potencial biótico da "broca do café": Hypothenemus Hampei (Ferr.) - E considerações sôbre o crescimento de sua população. IV - Uma correção no cálculo do potencial de oviposição do inseto
Provedor de dados: 53
Autores: Mendes,Luiz O. T.
Tipo: Info:eu-repo/semantics/other
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000300008

Determinação do potencial biótico da "broca do café": Hypothenemus Hampei (Ferr.) - E considerações sôbre o crescimento de sua população. II - A importância da diminuição do índice inicial de infestação no grau final de frutos de café atacados pela praga
Provedor de dados: 53
Autores: Mendes,Luiz O. T.
Em trabalho apresentado à Academia Brasileira de Ciências, o autor, estudando o que se conhece a respeito do comportamento da "Broca do Café", deduziu uma equação teórica que traduz o crescimento de uma população dêsse inseto, nos cafèzais, considerando-a do tipo fechado, à vista da limitação dos seus meios de subsistência. A infestação porcentual de frutos de café pode ser achada a qualquer momento "t" pela aplicação da fórmula Pt(4)0 = 100/1+(m/iq - 1) e -2,303 log (m/iq - 1)- log (m/iqp2 - 1)]t Continuando seus estudos, e aproveitando-se dos dados biológicos já publicados por outro pesquisador (1), o autor determina que, podendo uma única fêmea do inseto atacar sucessivamente até quatro frutos, a equação atrás se transforma em Pt(4)0 = 100/1+ (20,02/iq...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000300006

Genética de Coffea: XII - Hereditariedade da côr amarela da semente
Provedor de dados: 53
Autores: Carvalho,A.; Krug,C. A.
The known species of Coffea can be grouped into two categories according to the color of their endosperm which is either green or yellow. The commercially cultivated varieties of Coffea arabica L. and Coffea canephora Pierre ex Froehner are well known for the green color of their seed while the less known varieties of Coffea liberica Hiern and Coffea Dewevrei De Wild, et Th. Dur. have yellow Feed. In 1935, however, a yellow seeded type of C. arabica, was found in Brazil and has been described as Coffea arabica L. var. cera K.M.C. ; it is believed to have originated by mutation from Coffea arabica L. var. typica Cramer. In this paper the authors present the results of a genetic study of the yellow seeded mutant known as "cera". It has been found that in C....
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000300005

Dosagem do potássio e sódio pelo "fotômetro de chama": Sua aplicação em análise de solo
Provedor de dados: 53
Autores: Catani,R. A.; Paiva Neto,J. K. de.
A determinação do potássio no solo exige processos químicos sensíveis e precisos, dado o baixo teor em que, no geral, se encontra êsse íon. A dosagem dêsse elemento, bem como a do sódio, pelos processos comuns, são bastante morosas. Por êsse motivo, resolveu-se estudar a aplicação, para os nossos solos, do método rápido da Fotometria de Chama, já em uso em outros países de clima e solos diferentes, na dosagem do potássio e sódio "trocáveis". As determinações foram, a princípio, realizadas com o Fotômetro de Chama Perkin-Elmer, modêlo 18, e, posteriormente, com o modelo 52-A. Os dados obtidos permitiram formular indicações de caráter geral para a dosagem do potássio "trocável" nos solos do Estado de São Paulo. Em linhas gerais, o método adotado nas...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000300003

Um enrolamento das fôlhas do fumo de causa genética
Provedor de dados: 53
Autores: Costa,A. S.; Forster,R.
A type of leaf-roll has been noticed for many years in commercial tobacco plantings in the State of S. Paulo. Leaf-roll plants were supposed to be affected by a virus disease, but repeated attempts to transmit it by grafting, juice inoculation and by insect vectors failed consistently. Later studies showed that the leaf-roll condition is due to genetic factors and that probably more than a pair of recessive genes are involved in its transmission. Even after the genetic nature of the leaf-roll condition was definitely established, attempts were made to induce the leaf-roll condition in plants genetically normal by several methods : 1. Spraying their leaves with the juice from leaf-roll plants ; 2. Approach-grafting a leaf-roll scion onto a normal plant and...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000100005

Observações citológicas em Dysdercus cadeias de cromossômios em tecido somático de Dysdercus mendesi Bloete (Hemiptera-Pyrrhocoridae)
Provedor de dados: 53
Autores: Mendes,Luiz O. T.
The male of Dysdercus mendesi Bloete (1937) has 2n = 16 chromosomes : 14 autosomes and 2 sex-chromosomes. Details are presented on the morphology of these chromosomes of the somatic cells of embryonic tissue. The long pair of rod shaped chromosomes is the longest of the set, and they show a conspicuous sub-terminal constriction (supposed to be the centromere) and five other smaller constrictions. In most of the other chromosomes sub-terminally localized constriction (supposed also to be the centromere) can also be observed. Based on these observations it has been concluded that the chromosomes of D. mendesi are morphologically normal. Dicentric chromosomes in the somatic tissue of this species are absent and the hypothesis of existence of diffuse...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000100007

Sintomas de deficiências minerais no cafeeiro
Provedor de dados: 53
Autores: Franco,C. M.; Mendes,H. C.
Coffee plants (Coffea arabica L.) were grown in nutrient solutions for the purpose of studying deficiency symptoms of the following elements : nitrogen, phosphorus, potassium, magnesium, calcium, sulphur and iron. The methods employed in the growing of coffee plants in the nutrient solutions are described. After preliminary tests with several nutrient solutions Hoagland's formula was selected as most suitable for the present tests. However, the quantity of phosphate employed in the basic nutrient solution was reduced to one third of that given in Hoagland's formula. This reduction in phosphate was made because of the previous results obtained by Jacob which seemed to indicate that the coffee plant requires only very small amounts of phosphorus. In the...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000300002

As formas "trocável" e "fixa" dos cations k+, ca++ e mg++ nos solos do estado de São Paulo
Provedor de dados: 53
Autores: Catani,R. A.; Küpper,A.
O conhecimento das caraterísticas químicas dos solos tropicais e subtropicais assume, dia a dia, maior importância, à medida que se desenvolve a nossa agricultura. No presente trabalho foram examinadas amostras representativas de quatro dos principais tipos de solo do Estado de São Paulo, a saber : Massapé-salmourão, Glacial, Terra-roxa legítima e Arenito Bauru. Procurou-se determinar se os elementos potássio, cálcio e magnésio se acham na forma "trocável" e "não trocável", e em que proporções. Primeiramente são apresentadas as propriedades físico-químicas e mecânicas das amostras dos solos, a fim de melhor caraterizá-las. A seguir, são dados os resultados obtidos sobre os teores "trocáveis" de potássio, cálcio e magnésio, extraídos do solo por dois...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000300004

Observações citológicas em Coffea: XIII - Observações preliminares em Coffea arabica L. Var. rugosa K. M. C.
Provedor de dados: 53
Autores: Medina,Dixier M.
The Coffea arabica L. variety rugosa has been characterized as having rugose or roughened leaves. However, progenies of this variety obtained from selfed and open pollinated flowers have not, as observed to date, produced plants with characteristic rugose or definitely roughened leaves. This lack of rugose leaves in the seedling progeny of the variety rugosa led to the present cytological investigation to determine whether rugose leaves might be due to differences in the polyploid nature of the component leaf layers. Chromosome counts were made in cells of tissue obtained from root tips of seedlings and from root tips from stem cuttings, and from very young leaf buds. Chromosomes were also counted in the microsporocytes and in the microspores. The results...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000100006

O empobrecimento causado pela erosão e pela cultura algodoeira no solo do arenito Bauru
Provedor de dados: 53
Autores: Grohmann,F.; Catani,R. A.
The empovrishment of the soil brought about by erosion and cultivation of cotton has been studied in experimental plots where catch tanks were employed to collect soil removed by erosion. These tests have been carried out by the Soil Conservation Department at the Experiment Station of the Instituto Agronômico of Campinas, in Pindorama, and on the "Arenito Bauru" soil type representative of the region. Actually sixty percent of all coffee and eighty percent of all cotton cultivation in the State of São Paulo is on the "Arenito Bauru" soil type. Thus the data collected, although preliminary, are of great interest, and indicate that the empovrishment of the "Arenito Bauru" soil by erosion is extremely rapid. It is also pointed out that the "Arenito Bauru"...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000200003

Investigações sôbre a tristeza dos Citrus: II - Conceitos e dados sôbre a reação das plantas cítricas à tristeza
Provedor de dados: 53
Autores: Costa,A. S.; Grant,T. J.; Moreira,S.
The writers review previous concepts concerning the reaction of citrus plants to the tristeza disease. It is recognized that environmental factors such as temperature, humidity and light can influence plant reaction, but these are considered of relatively minor importance. Characteristics of the plant itself govern its reaction to the disease and among those, resistance to infection, ability to permit virus increase and tolerance or non-tolerance of tissues are considered most important. Tests using viruliferous oriental citrus aphids for inoculation of various citrus types budded over sour orange rootstocks (table 1 and 2) showed a correlation between susceptibility to infection and severity of symptoms. The sweet oranges proved to be the most susceptible...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000100008

Mutações em Coffea arabica L.
Provedor de dados: 53
Autores: Krug,C. A.
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000100001

Plantas úteis para o revestimento do solo pesquisa acêrca das suas caraterísticas de cobertura e travamento
Provedor de dados: 53
Autores: Alencar,F. M. Aires de.
O autor descreve, neste trabalho, investigações realizadas sôbre as caraterísticas de cobertura e fixação do solo, de dez espécies vegetais. A técnica e o método que empregou consistiram, em síntese, em fazer cortes da parte aérea e em escavar blocos de terra com raízes a determinadas alturas e profundidades, numa área de 0,25 m², de forma a obter a densidade de cobertura do solo pela parte aérea e de travamento pela parte subterrânea, a diferentes distâncias da superfície do solo. Os resultados obtidos levaram às seguintes conclusões preliminares : a) A espécie Paspalum notatum Flügge, compreendendo duas variedades - grama Batatais de fôlha larga e grama Americana de folha estreita, apresentou a maior percentagem em pêso e volume da parte aérea e...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000200004

Introdução ao estudo da auto-esterilidade no gênero Coffea
Provedor de dados: 53
Autores: Mendes,Cândida H. T.
Após fazer a revisão de alguns dos principais trabalhos sôbre a auto-esterilidade no gênero Coffea efetuados em Java, foram relatados, de modo resumido, os resultados das pesquisas genéticas e citológicas que estão sendo feitas com os exemplares da espécie C. canephora no Instituto Agronômico de Campinas. Êstes estudos têm por finalidade conhecer o grau e as causas da auto-esterilidade dessas plantas. As autopolinizações realizadas indicaram que êsses cafeeiros são, realmente, auto-estéreis. Dos cruzamentos feitos, cerca de 50% se mostraram compatíveis. Tanto a formação do saco embrionário como a do pólen são normais. Em meio artificial conveniente, o pólen apresenta cêrca de 55% de germinação, o que foi considerado suficiente para promover a fertilização...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000100004

The people shall judge reading in the formation of American Policy
Provedor de dados: 121
Autores: The college of the universitiy of Chicago.
Tipo: Text
Palavras-chave: HISTORIA; GUERRA HISPANOAMERICANA; DIPLOMACIA; SIGLO XIX; SIGLO XX; GUERRA MUNDIAL II.
Ano: 1949
URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=139495&tab=opac&oai:flacso.org.ec:139495

A totalitarian state of the past the civilization of the Inca Empire in ancient Peru
Provedor de dados: 121
Autores: Rafael Karsten; Karsten, Rafael.
Tipo: Text
Palavras-chave: ETNOHISTORIA; INCAS.
Ano: 1949
URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=109376&tab=opac&oai:flacso.org.ec:109376

La Santa Biblia antiguo y nuevo testamento
Provedor de dados: 121
Tipo: Text
Palavras-chave: CRISTIANISMO.
Ano: 1949
URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=137992&tab=opac&oai:flacso.org.ec:137992

Sociology a study of society and culture.
Provedor de dados: 121
Autores: ed. por Kimball Young; Young, Kimball, ed.
Tipo: Text
Palavras-chave: SOCIEDAD; CULTURA; COMUNIDADES; CAMBIO SOCIAL; RACISMO; FAMILIA; ASPECTOS SOCIALES.
Ano: 1949
URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=10153&tab=opac&oai:flacso.org.ec:10153

Mujeres de mi patria
Provedor de dados: 121
Autores: Morayma Ofyr Carvajal; Carvajal, Morayma Ofyr.
Tipo: Text
Palavras-chave: MUJERES; HISTORIA.
Ano: 1949
URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=140121&tab=opac&oai:flacso.org.ec:140121

The inter-american regional system
Provedor de dados: 121
Autores: Charles G. Fenwick; Fenwick, Charles G.
Tipo: Text
Palavras-chave: RELACIONES INTERNACIONALES; ESTADOS UNIDOS.
Ano: 1949
URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=103013&tab=opac&oai:flacso.org.ec:103013