The Contributors' ColumnC. M. Falconer, Richard N. Hunt, Marjorie Joy Paul, Edwin H. Armstrong, Francis H. Allen, Carl I. Shoemaker, J. Cooper Reeve, Robert S. Chalmers, C. G. Moore, Roscoe Pulliam, Carleton E. Davis, and Charles E. KelloggApril 1, 1931
The Contributors' ColumnDavid Starr Jordan, W. W. Drew, Earl Davis, E. P. L., Carl I. Shoemaker, H. Perlee Bouton, and ElizabethApril 1, 1926