The Shipley Collection of Scientific Papers, Volume 331890 - Zoology |
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Page 3
... existence amongst the scientific societies in Scotland . I cannot but think that I owe this honour to a friendly feeling entertained towards me personally by the members , so many of whom I can claim as old pupils , rather than to the ...
... existence amongst the scientific societies in Scotland . I cannot but think that I owe this honour to a friendly feeling entertained towards me personally by the members , so many of whom I can claim as old pupils , rather than to the ...
Page 4
... existence . Our great duty is to advance those sciences in which the instrument is employed ; to probe to their very depths the secret places of nature , and to do our best to advance knowledge . We shall have to inquire into the ...
... existence . Our great duty is to advance those sciences in which the instrument is employed ; to probe to their very depths the secret places of nature , and to do our best to advance knowledge . We shall have to inquire into the ...
Page 34
... existence ; but the conditions under which the budding off of protoplasm can take place are exceptional in the higher organisms . Protoplasm , therefore , according to this definition , in addition to being a moving con- tractile ...
... existence ; but the conditions under which the budding off of protoplasm can take place are exceptional in the higher organisms . Protoplasm , therefore , according to this definition , in addition to being a moving con- tractile ...
Page 44
... existence ; in the latter case the developing animal is shut off from the influence of external conditions , either inside an egg - membrane or in the uterus of the mother ; but in both cases it is relieved from the necessity of having ...
... existence ; in the latter case the developing animal is shut off from the influence of external conditions , either inside an egg - membrane or in the uterus of the mother ; but in both cases it is relieved from the necessity of having ...
Page 44
... existence is to be regarded as an immensely modified larva . If this view be true it follows that , however modified the record of ancestral history contained in the larval development may be , the embryonic record of the same history ...
... existence is to be regarded as an immensely modified larva . If this view be true it follows that , however modified the record of ancestral history contained in the larval development may be , the embryonic record of the same history ...
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.