Page:Popular Science Monthly Volume 74.djvu/628

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