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Nature25.10.1877
  • Datum
    Donnerstag, 25. Oktober 1877
  • Erschienen
    London
  • Verbreitungsort(e)
    London
Anzahl der Treffer: 3
[...] Seebohm's collections in the wreck of the Zºhames were un founded. Mr. Seebohm has reached England with a very large collection of birds' skins and eggs, made in Northern Russia during the past summer. [...]
[...] presented by the diaphragm after its nerves have been cut.— M. H. Fol described observations made by him on the origin of the follicle which surrounds the egg of ascidians. It has been wrongly supposed that the cellules of the follicles form part of the stroma of the ovary. The cellules originate in the interior [...]
[...] wrongly supposed that the cellules of the follicles form part of the stroma of the ovary. The cellules originate in the interior of the young eggs, at the surface of the germinative vesicle, and traverse the whole thickness of the vitellus to reach the surface of the ovule and detach themselves from it. . This example of so [...]
Nature18.10.1877
  • Datum
    Donnerstag, 18. Oktober 1877
  • Erschienen
    London
  • Verbreitungsort(e)
    London
Anzahl der Treffer: 2
[...] and as a base for the improvements we were able to obtain. At midnight we anchored on the eastern side, south of the “egg-crater,” and off the great lagune. The next day we took altitudes of the sun from the ship's deck, landing being impossible. The latitude of [...]
[...] competent to decide here, agree with him perfectly, and are greatly astonished, that a Columbus should not long ago have placed this physiological egg upon its point. The degree of perfection which each organ of sensation has attained in development therefore corresponds exactly to the [...]
Nature04.10.1877
  • Datum
    Donnerstag, 04. Oktober 1877
  • Erschienen
    London
  • Verbreitungsort(e)
    London
Anzahl der Treffer: 3
[...] tion of the corresponding changes of form, which the ancestors of the organism in question have passed through in the course of many millions of years. If to-day we place a hen's egg into the breeding machine, and if twenty-one days later we see a little chicken creep from it, we no longer remain in mute astonish [...]
[...] chicken creep from it, we no longer remain in mute astonish ment at the wonderſul changes which lead from the simple cell in the egg to the two-leaved gastrula, from this to the worm shaped and skull-less germ and thence to ſurther germ-forms, which on the whole show the organisation of a fish, an amphibian, [...]
[...] belong. Courageous warriors of the ant state set themselves up in powerful defence against our interfering finger; those that tend the young save the so-called “ants' eggs,” the beloved pupae, upon which rests the future of the state ; diligent workers at once begin with undaunted courage to clear away the débris, [...]
Nature13.09.1877
  • Datum
    Donnerstag, 13. September 1877
  • Erschienen
    London
  • Verbreitungsort(e)
    London
Anzahl der Treffer: 6
[...] in the American journal of Science and Art for 1854 (ser. 2, xvii. pp. 369-374). Wyman has there stated that the eggs of Pipa are transferred by the male to the back of the female, which presents “a uniform surface throughout.” “Their presence excites increased activity [...]
[...] surface throughout.” “Their presence excites increased activity in the skin, which thickens, and is gradually built up around each egg, so as at length to inclose them in a well-defined pouch.” On pages 370 and 371 he figures and describes the earlier embryos as having “three branchial appendages on each [...]
[...] In endeavouring to obtain some confirmation of Prof. Wyman's observations, Mr. Wilder suggested an examination of certain eggs of this singular Batrachian preserved in the Warren Ana tomical Museum of Harvard University. The examination was made by Mr. C. S. Meriot, who reported as follows:– [...]
[...] tomical Museum of Harvard University. The examination was made by Mr. C. S. Meriot, who reported as follows:– “I have examined two eggs from the back of the Pipa, and found the embryos a little more advanced than that figured by Prof. Wyman ; they are between 12 and 13 mm. in length. [...]
[...] still projecting could be readily seen on each side at the back of the head. I could not make a more detailed examination, as the eggs were not well enough preserved.” It would therefore appear that Dr. Peters' remark (which was translated in the above-mentioned paper in NATURE on [...]
[...] correction, thankful that my blunder has assisted in rightly solving an interesting and vexed question. The blacks inform me that the Echidna lays a white egg, and the Platypus a black one, which are hatched in the abdominal pouch. I trust that some of your many scientific contributors will come [...]
Nature06.09.1877
  • Datum
    Donnerstag, 06. September 1877
  • Erschienen
    London
  • Verbreitungsort(e)
    London
Anzahl der Treffer: 6
[...] of the experiments in 1853 up to the present time, will not be equal to the operations of one season on the Upper Sacramento; in 1875 the salmon eggs collected numbered II,000,000, making a bulk of eighty bushels, and weighing nearly ten tons ! These eggs, so carefully packed that [...]
[...] these numbers can now be taken. Enormous quantities of go, are in complete accordance with those I have obtained from shad have been bred from the egg and sent into the a similar comparison of some of the rainfalls in Bengal. [...]
[...] from the Atlantic Ocean. It is thought probable that the four specimens did not ultimately live, but as two of the four were big with spawn it is probable the eggs would come to maturity, as the death of the parent does not kill the spawn. Lobster eggs, unlike fish ova, are fructified [...]
[...] Prof. MacAlister reſerred to recent important advances in embryology. Among researches respecting the early fºrmation and primary developmental changes in the egg, he alluded to those of E. van Beneden, Bütschli, Ihering, and Oscar Hertwig, classified under three heads. (1) What is the method whereby [...]
[...] those of E. van Beneden, Bütschli, Ihering, and Oscar Hertwig, classified under three heads. (1) What is the method whereby the stimulus to development directly operates on the egg : (2) What becomes of the germinal vesicle ; and (3) In what manner and from what source the directive corpuscles arise, and what [...]
[...] function do they serve in the animal economy. The next subject dealt with was the history of the primitive groove of the ſertilised egg, as discovered by Dursy, Schäfer, Balfour, and Rauber. Prof. MacAlister could not but believe that a change had taken place in the position of the embryo on the surface of the germinal [...]
Nature30.08.1877
  • Datum
    Donnerstag, 30. August 1877
  • Erschienen
    London
  • Verbreitungsort(e)
    London
Anzahl der Treffer: 2
[...] cellaris, an insect commonly found in cellars and cupboards, delighting in stale beer, wine, &c. In answer to a question asked by Mr. Ogilvie, he said that the eggs were laid in the pickle-jar, [...]
[...] Cv (x), by M. Gegenbauer.-On intermediate cells in the large antheridium cell of the pollen grain of some Coniferae, by M. Tomaschek. —On the properties of dialysed egg albumen, by M. Laptschinsky.—The volcano of Monteferru, in Sardinia, by M. Doelter.—On a relation corresponding to the linear differen [...]
Nature[Beilage] 16.08.1877
  • Datum
    Donnerstag, 16. August 1877
  • Erschienen
    London
  • Verbreitungsort(e)
    London
Anzahl der Treffer: 1
[...] A PLAIN and EASY ACCOUNT of the BRITISH CoNTENTS.–Geological Specimens, by the Editor; Bones, by FUNGI. With especial reference to the Esculent and E. F. Elwin ; Birds' Eggs, by T. Southwell, F. Z.S.; Butter other Economic Species. Third Edition, revised. With flies, by Dr. Knaggs ; Beetles, by E. C. Rye, F.Z.S.; Hymen [...]
Nature16.08.1877
  • Datum
    Donnerstag, 16. August 1877
  • Erschienen
    London
  • Verbreitungsort(e)
    London
Anzahl der Treffer: 10
[...] animals, and to certain parts only of the history of their develop ment; more particularly the structure and formation of the ovum or egg, its earlier developmental changes, and the relation of these to the formation of the new animal. I cannot enter upon the consideration of this topic without [...]
[...] development. The germinal element, ſrom which, when fertilised, the new animal is derived, is contained within the animal ovum or egg— a compact and definite mass of organic matter, in which, not withstanding great apparent variations, there is maintained [...]
[...] substance is inclosed by an external vesicular membrane or cell wall. Within this covering the cell-substance, generally named yolk or vitellus, from the analogy of the fowl's egg, consists, to a greater or less extent, of a mass of protoplasm, and imbedded in this mass, in a determinate situation, there is ſound a smaller [...]
[...] any difference in the size of the mature ovum. On the other hand, if we compare this small ovum of the mammal with the yolk of the egg in the common fowl, the part to which it most nearly corresponds, it may be estimated that the latter body would contain above three millions of the smaller [...]
[...] brates; and are distinguished by the strictly germinal part or protoplasm being collected into a small disc, known familiarly as the cicatricula of the ſowl's egg, and to be seen as a whitish spot on that side of the yolk which naturally floats uppermost ; while the rest of the yolk, of a deeper yellow colour, contains a [...]
[...] ovum undergoes entire segmentation, this process is confined to the substance of the cicatricula or germinal disc of the bird's egg. This process is essentially one of cell-division, but it is also in some measure one of cell-formation. The best idea of its nature will be obtained from a short description of the total [...]
[...] bilaminar blastoderm or embryonic germinal membrane. The process of partial segmentation, such as occurs in the bird's egg, though perhaps fundamentally the same as that of the mammal previously described, stands in a different relation to the parts of the whole yolk or egg, and consequently differs [...]
[...] germinal disc is divided into the two layers of nucleated cells, constituting the blastoderma or germinal membrane of Pander and all subsequent embryologists." If a laid egg be sub jected to the heat of incubation for eight or ten hours, the cica tricula, now converted into this segmented blastoderm, is found [...]
[...] theilung,” Jena, 1875. 4. Edward Van Beneden's researches, partly in his memoir “On the Composition and Significance of the Egg,” &c., presented to the Belgian Academy in 1868, and inore particularly in the extremely interesting pre liminary account of “Researches on the Development of Mammalia,” &c., [...]
[...] On a new larval form of Cestoides (second note), by M. Villot. —M. Perez made some observations on M. Fol's opinions regarding fecundation of the egg in the star-fish and sea-urchin. [...]
Nature09.08.1877
  • Datum
    Donnerstag, 09. August 1877
  • Erschienen
    London
  • Verbreitungsort(e)
    London
Anzahl der Treffer: 2
[...] which form its favourite food. In 1872 a cock and two hens were reared ; but the male bird got destroyed. In 1873 two settings of eggs were hatched, but owing to a wet summer all the young birds perished after nearly arriving at maturity. In 1874 four fine birds were reared [...]
[...] arriving at maturity. In 1874 four fine birds were reared to their full growth, one of which, a male, still survives. In 1876 fifteen chicks were hatched out of twenty eggs, and three cocks and four hens grew to maturity. But the stock has become reduced to five individuals, three [...]
Nature12.07.1877
  • Datum
    Donnerstag, 12. Juli 1877
  • Erschienen
    London
  • Verbreitungsort(e)
    London
Anzahl der Treffer: 3
[...] ments of the old nucleus !” This is the more important since Schaafhausen affirms that he has seen P. aurelia lay or deposit ova ; “the organisms crammed full of egg spheres, surrounded with clear fluid, extrudes in an hour several times one such egg.” [...]
[...] I believe I may say there is exact analogy between this system for exterminating insect life in animals and that adopted by Dr. Tyndall to show that the earliest eggs or germs of bacteria are extremely obstinate to kill, whilst the more fully developed are destroyed without difficulty, clearly showing that more than one [...]
[...] which was stated to consist of about 679 skins of terrestrial and 198 of oceanic birds, besides a considerable series of specimens in salt and in spirit, and a collection of eggs, principally of the oceanic species.—A communication was read from the Marquis of Tweeddale, F.R.S., containing a report on the collection of [...]
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