- Alfred Alexander Brown, Christian I. Gunness, Emil Frederick Guba, Frank Alfred Hays, John Geddie Archibald, John Searls Bailey, Massachusetts Agricultural Experiment Station, Walter Arnold Maclinn, William George Colby, Clarence Howard Parsons, Jessie Elizabeth Donley, Joseph L. Kelly, Oliver Cousens Roberts, Ralph Wilfred Donaldson, Ruby Sanborn, Henry James Franklin, William Richardson Cole
· 1938