The Shipley Collection of Scientific Papers, Volume 331890 - Zoology |
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Page 15
... fact that the Royal Society of London awarded to their author in 1839 one of the Royal Medals . The neglect into ... facts of cell THE CELL THEORY , PAST AND PRESENT . 15.
... fact that the Royal Society of London awarded to their author in 1839 one of the Royal Medals . The neglect into ... facts of cell THE CELL THEORY , PAST AND PRESENT . 15.
Page 16
as having an important bearing on the facts of cell - formation and function . He repeated his observations on the ... fact , that in animals new cells arose within pre - existing cells , as Schleiden . had affirmed to be the case in ...
as having an important bearing on the facts of cell - formation and function . He repeated his observations on the ... fact , that in animals new cells arose within pre - existing cells , as Schleiden . had affirmed to be the case in ...
Page 17
... fact , that by far the greater portion of the nucleus , in- stead of existing anterior to the formation of the cell , arises within the cavity . " Further , he says , " young cells originate through divi- sion of the nucleus of the ...
... fact , that by far the greater portion of the nucleus , in- stead of existing anterior to the formation of the cell , arises within the cavity . " Further , he says , " young cells originate through divi- sion of the nucleus of the ...
Page 39
... characters through the segmentation nucleus . Its individuality is that which is characteristic of itself ; and arises from the fact that in the course of development a measure of variability THE CELL THEORY , PAST AND PRESENT . 39.
... characters through the segmentation nucleus . Its individuality is that which is characteristic of itself ; and arises from the fact that in the course of development a measure of variability THE CELL THEORY , PAST AND PRESENT . 39.
Page 44
... fact that features observed in both types of de- velopment seem inexplicable except on the assumption that they are reminiscences of structures possessed by the ances- tors of the animals in whose development they appear . Such traces ...
... fact that features observed in both types of de- velopment seem inexplicable except on the assumption that they are reminiscences of structures possessed by the ances- tors of the animals in whose development they appear . Such traces ...
Common terms and phrases
acquired characters Actinozoa adult alimentary Amphioxus Anatomy ancestral Annelid ants appear archenteron assume become blastopore body Burchell's zebra carapace-length cavity changes chromatin cœlom colour connection corpuscles degeneration dentary derived deviation differentiation diploblastic disuse division ectoderm eggs embryo essay evolution excretory existence explanation fact females fibres formation frontal breadth germ germ-plasm growth homologous horse hybrid hypothesis important insects instance instincts larva larvæ legs less males mare mean mesoblast Metazoa modified morphological mouth and anus natural selection nephridia nervous system neural canal nucleus number of glands nutrition observations occur ontogeny organs origin ovum Panmixia Peripatus plants plasm pores pouches present primitive streak principle produced Professor Weismann protoplasm recognised regard reproductive cells result Schwann Sedgwick segmentation nucleus segmented animals somites specialised species Spencer stage structure substance supposed telegony theory tion tissues unicellular variability variations Vertebrata Vertebrate workers yolk zebra
Popular passages
Page 65 - The elementary parts of all tissues are formed of cells in an analogous, though very diversified manner, so that it may be asserted, that there is one universal principle of development for the elementary parts of organisms, however different, and that this principle is the formation of cells.
Page 7 - XVIII. OF THE SCHEMATISME OR TEXTURE OF CORK, AND OF THE CELLS AND PORES OF SOME OTHER SUCH FROTHY BODIES...
Page 72 - PROCESSES, AND COLLATERAL INFORMATION IN THE ARTS, MANUFACTURES, PROFESSIONS, AND TRADES, INCLUDING MEDICINE, PHARMACY, AND DOMESTIC ECONOMY ; designed as a General Book of Reference for the Manufacturer, Tradesman, Amateur, and Heads of Families.