by Charles Cathbert Wright, Chester Druse Schwartze, Chester Leon Vincent, D. J. Crowley, Edwin F. Dummeier, Edwin George Schafer, Edwin Herman Steffen, Elizabeth Neige Todhunter, Fred Lloyd Overley, Frederick John Sievers, H. N. Colby, Harry L. Garver, John Stuart Carver, Leslie John Smith, R. P. Bean, Washington Agricultural Experiment Station, E. L. Overholser, Henry F. Holtz, William A. Luce

1926

by Manley Alexander Raymond Kelley, Bess Viemont Morrison, Carol Willis Moffett, Edmund Cecil Shorey, F. E. Staebner, Furman Lloyd Mulford, G. R. Hoerner, Glenn Kenton Rule, Harry Waltner Titus, Harvey Leroy Westover, Joel G. Winkjer, John Holmes Martin, John Robert Parker, Karl S. Quisenberry, Kenneth Welton, Margaret Smith, Richmond Young Bailey, Wilbur Clifford Edmundson, William Randolph Walton, William Renwick Beattie, Clyde Monroe Packard, Frank Rabak, Freeman Weiss, J. C. Stephens, John Walter Taylor, Ralph Wagner Netterstrom, W. H. Hosterman

1941