Journal of Applied Microscopy, 1900, Vol. 3 (Classic Reprint) - Couverture souple

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9780282967000: Journal of Applied Microscopy, 1900, Vol. 3 (Classic Reprint)

Synopsis

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Présentation de l'éditeur

Journal of Applied Microscopy. VOLUME III. JANUARY, 1900. NUMBER 1T he American Society of Naturalists. The 18th annual meeting of the American Society of Naturalists met at New Haven, Conn., December 27th, 28th, and 29th. Several other scientific societies met at the same time, and in all there were between 400 and 500 members assembled. The sessions of the American Naturalists opened on Wednesday morning with the different sections in separate meetings. The American Morphological Society met in the Peabody Museum, Prof. Conklin of the University of Pennsylvania being chairman. The announcement was first made of the action taken by the Western members of the association, in forming at this time a Western branch of the American Morphological Society. This organization held its first meeting in Chicago during the last week of December, and is regularly accepted as a Western branch of the organization. While regretting the act of separation, the need for such a step is apparent when the meetings are held so uniformly in the East. Dr. C. S. Minot gave a paper on The Development and Morphology of the Vertebral Column. It was most interesting. He showed that in the pig and rabbit there is cartilagenous continuity at first, the whole axis being an unsegmented rod and rising by a series of cornifications; this rod the author designates as the chondrostyle. By increase in size the chondro-craniuih arises, the disappearance of the muscular segments in the head region causing the enlargement. Later a segmentation of this primitive rod appears and the final ossification takes place from centers having no morphological significance; these centers are for histogenic convenience purely. Dr. Parker reported an interesting study on the relation between the number of mammary glands in the pig and the number of young born at any one time, also a comparison between the number
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