624 



THE POPULAR SCIENCE MONTHLY 



Wallace, Alfred Russel, Origin of 

 the Theory of Natural Selection, 396 



Ward, Lester ¥., The Career of Her- 

 bert Spencer, 5 



Ward, Robert DeC, National Exposi- 

 tion at Rio de Janeiro, 105 



Wenley, R. IVi., The Halo of a Hundred 

 Years, 386 



Wheeler, William Morton, Predar- 



winian 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. Bum- 

 pus. 361 



