Darwiniana: Essays and Reviews Pertaining to DarwinismD. Appleton, 1889 - 396 páginas |
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Página i
... , over the same ground . If these essays were to be written now , some things might be differ- ently expressed or qualified , but probably not so as to affect materially any important point . According ly , ARTICLE ARTICLE.
... , over the same ground . If these essays were to be written now , some things might be differ- ently expressed or qualified , but probably not so as to affect materially any important point . According ly , ARTICLE ARTICLE.
Página 27
... probably the blood of more than one species is mingled , Mr. Darwin proceeds to show , adducing cogent reasons for the common opinion that all have descended from the wild rock- pigeon . Then follow some suggestive remarks : " I have ...
... probably the blood of more than one species is mingled , Mr. Darwin proceeds to show , adducing cogent reasons for the common opinion that all have descended from the wild rock- pigeon . Then follow some suggestive remarks : " I have ...
Página 31
... probably has some foundation . But even if we regard varieties as oscillations around a primitive centre or type , still it appears from the readiness with which such varieties originate that a certain amount of disturbance would carry ...
... probably has some foundation . But even if we regard varieties as oscillations around a primitive centre or type , still it appears from the readiness with which such varieties originate that a certain amount of disturbance would carry ...
Página 32
... the inheritance of disease or of tendency to dis- ease , which close interbreeding perpetuates and accumulates , but wide breeding may neutralize or eliminate . ence that probably no organic being self - fertilizes in- 32 DARWINIANA .
... the inheritance of disease or of tendency to dis- ease , which close interbreeding perpetuates and accumulates , but wide breeding may neutralize or eliminate . ence that probably no organic being self - fertilizes in- 32 DARWINIANA .
Página 33
Essays and Reviews Pertaining to Darwinism Asa Gray. ence that probably no organic being self - fertilizes in- definitely ; but that a cross with another individual is occasionally - perhaps at very long intervals - indis- pensable . We ...
Essays and Reviews Pertaining to Darwinism Asa Gray. ence that probably no organic being self - fertilizes in- definitely ; but that a cross with another individual is occasionally - perhaps at very long intervals - indis- pensable . We ...
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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.