Essays: Scientific, Political, and Speculative, Volume I. Spencer Herbert

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СКАЧАТЬ – the indirect adaptation resulting from the natural selection of favourable variations. The multiplication of effects is, however, equally illustrated in whatever way the adaptation to changing conditions is effected, or if it is effected in both ways, as I hold. I may add that there is indicated the view that the succession of organic forms is not serial but proceeds by perpetual divergence and re-divergence – that there has been a continual "divergence of many races from one race": each species being a "root" from which several other species branch out; and the growth of a tree being thus the implied symbol.

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"Personal Narrative of the Origin of the Caoutchouc, or India-Rubber Manufacture in England." By Thomas Hancock.

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Carpenter's Principles of Comparative Physiology, pp. 616-17.

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With the exception, perhaps, of the Myxinoid fishes, in which what is considered as the nasal orifice is single, and on the median line. But seeing how unusual is the position of this orifice, it seems questionable whether it is the true homologue of the nostrils.

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In the Westminster Review for April, 1857; and now reprinted in this volume.

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See Essay on "Progress: its Law and Cause."

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This was written before the publication of the Origin of Species. I leave it standing because it shows the stage of thought then arrived at.

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Cosmos. (Seventh Edition.) Vol. i. pp. 79, 80.