by Charles Adolph Weigel, Charles John Stauber, D. C. Parman, D. W. Jones, David Griffiths, Don Inskeep Skidmore, Elmer Ottis Wooton, Erastus Newton Bates, Ernst H. Wiecking, James A. Holden, John Chambers McDowell, John Clay Overpeck, Kelsey Beeler Gardner, Lloyd Stanley Tenny, Lucia McCulloch, Madge Janet Reese, Ora Stanley Fisher, Orator Fuller Cook, Raphael Zon, United States. Department of Agriculture, Ward Shepard, William Alfred Schoenfeld, William Edward Wintermeyer, D. J. Caffrey, Duncan Stuart, George P. Bodnar, William Norwood Sparhawk, R. R. Graves

1927

by Alexandre Arsene Girault, Carl Emil Lee, Cassius Clay Hayden, Charles Francis Briscoe, Cyril George Hopkins, Harold Hanson Mitchell, John William Lloyd, Louis Dixon Hall, Stephen Alfred Forbes, Wilber John Fraser, William Dietrich, Arthur Donaldson Emmett, Harry Sands Grindley, Nelson William Hepburn, Ora Stanley Fisher, Royden Earl Brand, Jerome Edward Readhimer

1912