Darwiniana: EssaysD. Appleton, 1897 - 475페이지 |
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3 페이지
... experimental fact , but that it is a provision for the preservation of the purity of species . Such a criterion as ... experiments that many hybrids are quite as fertile as the parent species , but he goes so far as to assert that the ...
... experimental fact , but that it is a provision for the preservation of the purity of species . Such a criterion as ... experiments that many hybrids are quite as fertile as the parent species , but he goes so far as to assert that the ...
20 페이지
... a vacuum . He is as greedy of cases and precedents as any constitutional lawyer , and all the principles he lays down are capable of being brought to the test of observation and experiment . The 20 I THE DARWINIAN HYPOTHESIS.
... a vacuum . He is as greedy of cases and precedents as any constitutional lawyer , and all the principles he lays down are capable of being brought to the test of observation and experiment . The 20 I THE DARWINIAN HYPOTHESIS.
21 페이지
Essays Thomas Henry Huxley. brought to the test of observation and experiment . The path he bids us follow professes to be , not a mere airy track , fabricated of ideal cobwebs , but a solid and broad bridge of facts . If it be so , it ...
Essays Thomas Henry Huxley. brought to the test of observation and experiment . The path he bids us follow professes to be , not a mere airy track , fabricated of ideal cobwebs , but a solid and broad bridge of facts . If it be so , it ...
46 페이지
... 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 practical difficulties lie ...
... 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 practical difficulties lie ...
48 페이지
... - should all run to a certain extent parallel with the systematic affinity of the forms which are subjected to experiment ; for systematic affinity attempts to express all kinds of resemblance between all species 48 II THE ORIGIN OF ...
... - should all run to a certain extent parallel with the systematic affinity of the forms which are subjected to experiment ; for systematic affinity attempts to express all kinds of resemblance between all species 48 II THE ORIGIN OF ...
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adapted Agamogenesis Ancon animalcules animals animals and plants appear beds biological birds body bones called carbonic acid causes character Charles Darwin common course creation cross curious Darwin Darwin's views deposited direct doctrine of evolution domestic pigeons doubt endeavour epigenesis epoch Erasmus Darwin evidence ex nihilo experiments extinct fact favour forms fossil geological germ groups horse Hyæna hypothesis ichthyosaurus inorganic world inquiry kind knowledge Lamarck lectures less living male matter means mind Mivart modification natural selection naturalists observation offspring operation organic nature organisation Origin of Species parent peculiar perpetuation phenomena physiological pigeons Pikermi Pouter present primitive stock produced Quarterly Reviewer question races reason remarkable result Rock Pigeon scientific selective breeding sense sheep skeleton sort speculations spontaneous structure Suarez substance suppose Teleology tendency theory thing tion toes variation varieties vary vegetable whole