Darwiniana: Essays and Reviews Pertaining to DarwinismD. Appleton, 1889 - 396 páginas |
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Página 12
... distinct individuals are min- gled in the offspring , it is supposed that the general 1 " Species tot sunt , quot diversas formas ab initio produxit Infini- tum Ens ; quæ formæ , secundum generationis inditas leges , produxere plures ...
... distinct individuals are min- gled in the offspring , it is supposed that the general 1 " Species tot sunt , quot diversas formas ab initio produxit Infini- tum Ens ; quæ formæ , secundum generationis inditas leges , produxere plures ...
Página 16
... distinct idea of what they meant by the term species , and a practical rule , which was hardly the less useful because difficult to apply in many cases , and because its application was indirect : that is , the community of origin had ...
... distinct idea of what they meant by the term species , and a practical rule , which was hardly the less useful because difficult to apply in many cases , and because its application was indirect : that is , the community of origin had ...
Página 17
... distinct genera much less closely related , and genera related in different degrees , forming sub - families , families , or- ders , sub - classes , and classes . The several subordinate groups in any class cannot be ranked in a single ...
... distinct genera much less closely related , and genera related in different degrees , forming sub - families , families , or- ders , sub - classes , and classes . The several subordinate groups in any class cannot be ranked in a single ...
Página 22
... distinct animals which succeed each other in alternate and very dissimilar generations . So that mere analogy might rather suggest a natural connec- tion than the contrary ; and the contrary cannot be demonstrated until the ...
... distinct animals which succeed each other in alternate and very dissimilar generations . So that mere analogy might rather suggest a natural connec- tion than the contrary ; and the contrary cannot be demonstrated until the ...
Página 27
... distinct species in a wild state : and even in Nature the individuals of some species are known to vary to a degree sensibly wider than that which separates related species . In his instructive section on the breeds of the domestic ...
... distinct species in a wild state : and even in Nature the individuals of some species are known to vary to a degree sensibly wider than that which separates related species . In his instructive section on the breeds of the domestic ...
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Términos y frases comunes
action adaptation Agassiz appears argument atheistic auroch bald cypress botanists Candolle Charles Darwin common conclusion connection creation crystalline lens Darwin Darwin's theory Darwinian derivation descendants Dionæa direct divine doctrine doubt Drosera equally evidence of design evolution existence explain extinct facts favor final causes force forms fossil genera genus geographical geological glands Glyptostrobus gradation ground human hypothesis idea illustration individuals inference insects instance laws least leaves less Linnæus living matter means ment mind miocene natural history natural selection natural theology naturalists nebular hypothesis object observation origin of species particular peculiar perhaps philosophical phyllotaxis physical plants and animals present principle probably produced proof prove question races reason regard region remarks reviewer Sarracenia scientific seems sense Sequoia sort structure succession sundew supernatural suppose Taxodium teleology tentacles tertiary theistic things thought tion tive trees types variation varieties vary vegetable whole
Pasajes populares
Página 129 - And God said, Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind: and it was so.
Página 396 - ON SOUND : A Course of Eight Lectures delivered at the Royal Institution of Great Britain.
Página 274 - My substance was not hid from thee, when I was made in secret, and curiously wrought in the lowest parts of the earth.
Página 16 - ... of the former and present buds by ramifying branches may well represent the classification of all extinct and living species in groups subordinate to groups. Of the many twigs which flourished when the tree was a mere bush, only two or three, now grown into great branches, yet survive and bear the other branches; so with the species which lived during long-past geological periods, very few have left living and modified descendants.
Página 16 - The green and budding twigs may represent existing species; and those produced during each former year may represent the long succession of extinct species. At each period of growth all the growing twigs have tried to branch out on all sides, and to overtop and kill the surrounding twigs and branches, in the same manner as species and groups of species have tried to overmaster other species in the great battle for life.
Página 102 - I can entertain no doubt, after the most deliberate study and dispassionate judgment of which I am capable, that the view which most naturalists until recently entertained, and which I formerly entertained, namely, that each species has been independently created, is erroneous. I am fully convinced that species are not immutable...
Página 102 - ... been stated that I attribute the modification of species exclusively to natural selection, I may be permitted to remark that in the first edition of this work, and subsequently, I placed in a most conspicuous position — namely, at the close of the Introduction the following words : "I am convinced that natural selection has been the main but not the exclusive means of modification.