| British Association for the Advancement of Science - 1877 - 826 lehte
...field still unexplored in Natural History." These coincident variations, he concludes by saying, " have never been systematically investigated. They...for many of the external characteristics of animals " (vol. ii. pp. 652, 5-33). And now to follow out the idea with which I began. Having touched on the... | |
| 1877 - 820 lehte
...as he has entered upon in the volumes under review "may not improbably lead to the discovery of some hidden laws (supplementary to natural selection) which...for many of the external characteristics of animals" (Vol. ii. pp. 553). The doctrine of the derivative origin of species is now used as a new " calculus... | |
| Mark V. Lomolino, Dov F. Sax, James H. Brown - 2004 - 1284 lehte
...geographical influences. Some of these coincident variations have been alluded to in various parti of this work, but they have never been systematically...account for many of the external characteristics of auimals. In concluding his task, the author venture! to suggest, that naturalists who are disposed... | |
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