Darwiniana: EssaysD. Appleton, 1896 - 475페이지 |
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9 페이지
... further we go back in time the less the buried species are like existing forms ; and , the fur- ther apart the sets of extinct creatures are , the less they are like one another . In other words , there has been a regular succession of ...
... further we go back in time the less the buried species are like existing forms ; and , the fur- ther apart the sets of extinct creatures are , the less they are like one another . In other words , there has been a regular succession of ...
46 페이지
... further difficulty , that experiments must be continued over a long time for the purpose of ascertaining the fertility of the mongrel or hybrid progeny , as well as of the first crosses from which they spring . Not only do these great ...
... further difficulty , that experiments must be continued over a long time for the purpose of ascertaining the fertility of the mongrel or hybrid progeny , as well as of the first crosses from which they spring . Not only do these great ...
55 페이지
... further illustrated in a most interesting manner by the impartial and highly competent testimony of M. Pictet , from whose calculations of what percentage of the genera of animals , existing in any formation , lived during the preceding ...
... further illustrated in a most interesting manner by the impartial and highly competent testimony of M. Pictet , from whose calculations of what percentage of the genera of animals , existing in any formation , lived during the preceding ...
89 페이지
... further development . Should , however , a variety be useful and even maintain itself , there is no obvious reason why it should change any further . The whole conception of the imperfection of organisms and the necessity of their ...
... further development . Should , however , a variety be useful and even maintain itself , there is no obvious reason why it should change any further . The whole conception of the imperfection of organisms and the necessity of their ...
99 페이지
... further that he has " imagined a natural selection : he imagines afterwards that this power of selecting ( pouvoir d'élire ) which he gives to Nature is similar to the power of man . These two suppositions ad- THE ORIGIN OF SPECIES ...
... further that he has " imagined a natural selection : he imagines afterwards that this power of selecting ( pouvoir d'élire ) which he gives to Nature is similar to the power of man . These two suppositions ad- THE ORIGIN OF SPECIES ...
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adapted admit Agamogenesis Ancon animalcules animals animals and plants appears believe biological birds body called causes character Charles Darwin course creation Crustacea Darwin Darwin's views Darwinian deposited direct doctrine of evolution domestic pigeons doubt Dysteleology endeavour epigenesis epoch Erasmus Darwin evidence ex nihilo exhibited existence extinct fact favour Flourens geological germ give rise groups horse Hyæna hypothesis inorganic world inquiry kind knowledge Lamarck laws lectures less living Maillet male matter means ment Mivart modification natural selection naturalists objections observation offspring organic nature organisation Origin of Species ovum parent peculiar phenomena philosophical physiological pigeons Pikermi present primitive stock produced Quarterly Reviewer question races reason remarkable result scientific selective breeding sensations sense special creation speculations spontaneous structure Suarez substantial forms suppose Teleology tendency theory thing tion toes variation varieties vegetabilia vegetable Wallace whole
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275 페이지 - In July opened first note-book on Transmutation of Species. Had been greatly struck from about the month of previous March on character of South American fossils, and species on Galapagos Archipelago. These facts (especially latter), origin of all my views."] 1836-1837.
262 페이지 - s lectures on Geology and Zoology, but they were incredibly dull The sole effect they produced on me was the determination never as long as I lived to read a book on Geology, or in any way to study the science.
279 페이지 - I soon perceived that selection was the keystone of man's success in making useful races of animals and plants. But how selection could be applied to organisms living in a state of nature remained for some time a mystery to me.
229 페이지 - History warns us, however, that it is the customary fate of new truths to begin as heresies and to end as superstitions...
112 페이지 - The teleological and the mechanical views of nature are not, necessarily, mutually exclusive. On the contrary, the more purely a mechanist the speculator is, the more firmly does he assume a primordial molecular arrangement of which all the phenomena of the universe...
162 페이지 - And if so, it must be true, in the same sense and to the same extent, that the thoughts to which I am now giving utterance, and your thoughts regarding them, are the expression of molecular changes in that matter of life which is the source of our other vital phenomena.
25 페이지 - ... maps and in museums, but by long voyages and laborious collection; having largely advanced each of these branches of science, and having spent many years in gathering and sifting materials for his present work; the store of accurately-registered facts upon which the author of the 'Origin of Species' is able to draw at will, is prodigious.
223 페이지 - natural selection " suffices for the production of species remains to be seen. Few can doubt that, if not the whole cause, it is a very important factor in that operation ; and that it must play a great part in the sorting out of varieties into those which are transitory and those which are permanent.
247 페이지 - The hour of departure has arrived, and we go our ways — I to die, and you to live. Which is better, God only knows.
255 페이지 - Lamarck and his views on evolution. I listened in silent astonishment, and as far as I can judge without any effect on my mind. I had previously read the Zoonomia of my grandfather, in which similar views are maintained, but without producing any effect on me. Nevertheless it is probable that the hearing rather early in life such views maintained and praised may have favoured my upholding them under a different form in my Origin of Species.