92 BIOLOGICAL SOCIETY OP WASHINGTON. cal state should be indicated by a definite combination of expres sions has not always been clearly shown. To-day the whole subject is studied from the point of view of anatomy and physiology. No occult force is admitted, the correlative nerve-supply of muscles and the effect of excitation of nerve-centers are rationally investigated. f Aside from the great special value of the work, of what tremen dous import to the race are Darwin's deductions ! For he has shown us that our every thought and act mold our physical frames, and through them the generations yet unborn, either to beauty and grace, or to uncouth ugliness >and deformity. As the struggle for existence filled the rocks with organisms forever extinct, because not for the highest use, so may we, too, fossilize and outgrow habits and desires of ignoble birth, ascending by the "power of leasts," by that wondrous calculus of nature, to purer and nobler existence. Darwin has taught us that the forces which, acting through countless cycles, have brought us up from formless slime, now remain in our hands to use for good or ill " That life is not as idle ore, But iion dug from central gloom, And heated hot with burning fears, And dipt in baths of hissing tears, And battered with the shocks of doom For shape and use." A DARWINIAN BIBLIOGRAPHY. BY FREDERICK W. TRUE, Librarian of the U. S. National Museum. The complete bibliography of Darwinism should contain, not alone the works which emanated from the busy brain and ready pen of Darwin himself, but the many other productions which these called into life. The aquiescences of friends, the objections of critics, the censures of foes, should all be enrolled in their proper places as representing the ripples and counter-ripples in the sea of
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