Wilhelm Bolsche, Love-Life in Nature: The Story of the Evolution of Love (New York: A. & C. Boni, 1926);

Gamaliel Bradford, Darwin (Boston & New York: Houghton Mifflin, 1926);

William H. Bragg, Creative Knowledge: Old Trades and New Science (New York & London: Harper, 1927);

C. D. Broad, Scientific Thought (New York: Harcourt, Brace, 1923);

Otis W. Caldwell and Edwin E. Slosson, eds., Science Remaking the World (Garden City, N.Y.: Doubleday, Page, 1923);

Herdman F. Cleland, Our Prehistoric Ancestors (New York: Coward-McCann, 1928);

A. P. Coleman, Ice Ages, Recent and Ancient (New York: Macmillan, 1926);

Henry Crew, The Rise of Modern Physics: A Popular Sketch (Baltimore: Williams &Wilkins, 1928);

J. T. Cunningham, Hormones and Heredity (New York: Macmillan, 1921);

Paul de Kruif, Hunger Fighters (New York: Harcourt, Brace, 1928);

de Kruif, Microbe Hunters (New York: Harcourt, Brace, 1926);

George A. Dorsey, Hows and Whys of Human Behavior (New York & London: Harper, 1929);

Dorsey, Why We Behave Like Human Beings (New York & London...