- Alvin George Anderson, Arthur Frederick Sievers, Brittain Bragunier Robinson, Charles Cloyes Fletcher, Charles Franklin Henderson, Charles W. Culpepper, Clarence Francis Kelly, Claude Kedzie Shedd, Edward Mackay Chace, George Lloyd Hayes, George McMillan Darrow, Harold Edwin Stevens, James Okley Grandstaff, Mark Hughlin Haller, O. K. Hedden, Paul Jones Chapman, R. W. Leukel, Robert Wallace Gerdel, Thornton Taft Munger, United States. Department of Agriculture, Walter Ernest Fleming, William Solomon Porte, Albert Ronald Merz, Archie Davilla Hess, Donald Navarre Matthews, Emory Dwight Burgess, Frederick Lovejoy Wellman, Harry Willard Von Loesecke, Hubert Hill Moon, Jacob Martin Lutz, Jay Brownlee Davidson, Joy Harold Clark, Ole Anker Nelson, Ralph Boutelle Piper, Robert Max Merrill, Walter Louis Hodde, Bailey Edgar Brown, Earl Dewey Mallison, Edgar Vermont Collins, John Laurence Heid, Warren W. Maines
· 1940
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