by Albert Rudolf Leding, Arnon Lewis Mehring, Arthur T. Sweet, Auton William Skuderna, Benjamin Ralph Stauber, Curtis May, David Griffiths, Floyd Franklin Smith, George Arceneaux, James Fitton Couch, John Morrison Cooper, John Robert Parker, Lewis Alexander Hurst, Orator Fuller Cook, Paul George Russell, Paul Mehl, R. A. Blanchard, R. T. Balch, Robert Max Merrill, Theodore Bergen Manny, United States. Department of Agriculture, Walter Ernest Fleming, Wilfred Wickes Ballard, William Middleton, Asa Young Willis, Avis Jenkin Peterson, Frederick William Metzger, J. I. Lauritzen, John Adam Stoehr, Ralph Brownson Bisland, Wayne Crocker Nason, Max Raymond Osburn

1933