- A. J. Pieters, Archibald Dixon Shamel, Benjamin Ralph Stauber, Chalmers Jackson King, Charles Sidney Leete, Charles Walter Collins, F. M. Grant, Fred Earl Keating, Frederick John Pritchard, Frederick Wulling Herbert, George McMillan Darrow, George Wright Hoffman, Harry Eugene Burke, Harvey John MacAloney, Hazel Katherine Stiebeling, Herman Meserve Johnson, Mary E. Sweeny, Neil E. Stevens, Orville Edward May, Oscar Roland Mathews, Perley Spaulding, Robert Claude Wright, Thomas Moore Whiteman, United States. Department of Agriculture, Walter Cochran Davis, Carl Stone Pomeroy, Charlotte Chatfield, Clarence Elbert Clement, George Fordyce Waldo, Harold Frederick Loomis, Horace Terhune Herrick, James Warren Hubbard, John Raymond Hansbrough, John Valentine Schaffner, Louis Henry Burgwald, Ruth Leah Morgan, Verner Ivan Clark, William Solomon Porte, Frank Nelson Harmon
· 1931
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Alonzo Bettis Cox, Carl Robert Swinson, Clifford E. Hood, Curtis Paul Clausen, E. W. Sheets, Ernest Adna Back, George Casper Haas, Henry F. Bain, Herman Meserve Johnson, Howard Archibald Turner, John Brown Cuno, John Robert Magness, Kelsey B. Gardner, L. P. Rockwood, Morgan William Evans, Raymond Secord Washburn, Robert Julius Formad, Robert Lee Nixon, Thomas K. Killand, William Clare Davis, William Willard Ashe, United States. Department of Agriculture, Edward John Hanzlik, Helmut Charles Diehl, Henry Desborough Scudder, Joseph Lyonel King, Lawrence Alfred Adams, Mordecai Ezekiel, R. T. Cotton, Ross Homan Tuckwiller, Warren Clemmer Funk, Cho Teranishi, Mark Hughlin Haller, William Henry Gibbons· 1926
Of results. pp. 34.
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