by Albrecht Eichhorn, C. H. Hadley, Carl Rohwer, Clarice Louisba Scott, Clifford Leslie Hamilton, E. C. Tullis, Edmund Lambert, Elma Edwards, Frank Custer Edminster, Freeman Weiss, Furman Lloyd Mulford, Glenn Kenton Rule, Harry L. Garver, Lucia McCulloch, Merton Chesleigh Lane, Norman Allen, Oliver I. Snapp, Roland McKee, Roy Douglas Hockensmith, Royal Joyslin Haskell, Samuel Benton Nuckols, Thomas Arrington Huntington Miller, Arthur Burdick Crawford, Edward G. Molander, Perry Kips Harrison, Sears Polydore Doolittle

1943

by Albert Watts Moore, Carl F. Dunker, Charles D. Converse, Claron Owens Hesse, Elmer Snyder, Everett Eugene Lund, Frank Custer Edminster, Franklin Elmer Allison, Franklin Jacob Crider, George Haymaker Vansell, Guy Weston Bohn, H. O. Hetzer, Harry Edward Goresline, Henry Hamilton Bennett, Herbert Spencer, Jesse Edward Harmond, Leslie Rushton Hawthorn, Myron Sallee Anderson, Oscar Roland Mathews, Ralph William Marquis, United States. Department of Agriculture, Elbert Hann Reid, Forrest G. Bell, Frank Nelson Harmon, Kirby M. Hayes, Leonard M. Klein, Lester Alan Thompson, Max Raymond Osburn, Sidney Fay Blake, Thomas Wallace Whitaker, Alfred W. Otte, Arnon Lewis Mehring, Bert D. Robinson, Paul A. Norman

1951