Page:Popular Science Monthly Volume 81.djvu/630

Thorndike, Edward L., The Permanence of Interests and their Relation to Abilities	449
Thought, Modern, Edward F. Williams	133
Trinidad and Bermudez Asphalts and their Use in Highway Construction, Clifford Richardson	19
Trinidad and Bermudez Asphalts and their Use in Highway Construction, Clifford Richardson	170
Turner, Edmund Raymond, The Hindu Arabic Numerals	601
United States, Population of, in 1910	204
""Agricultural Products of	519
University of Cincinnati, and its Cooperative Engineering Course	100
Valentine, Basil: A Seventeenth-century Hoax, John Maxson Stillman	591
Vital Statistics and the Decreasing Death Rate	617
Washburn, F. L., Modern Warfare against Grasshoppers	465
Williams, Edward F., Modern Thought	133
Wilson, Calvin Dill, Negroes, who owned Slaves	483
Wind-graved Mesas and their Message, Charles R. Keyes	227
World's Most Important Conservation Problem, Stewart Paton	163