Page:Popular Science Monthly Volume 74.djvu/628

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THE POPULAR SCIENCE MONTHLY



Wallace, Alfred Russel, Origin of the Theory of Natural Selection 396
Ward, Lester F., The Career of Herbert Spencer 5
Ward, Robert DeC., National Exposition at Rio de Janeiro 105
Wenley, R. M., The Halo of a Hundred Years 386
Wheeler, William Morton, Predarwinian and Postdarwinian Biology 381
Whitehead, J. B., Electric Operation of Steam Railways 209
Woodruff, Clinton Rogers, Railroads and the Smoke Nuisance 153

Zoology and Darwin, Hermon C. Bumpus 361
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