by Birely J. Landis, Charles D. Owens, Harry L. Garver, Jean H. Dawson, Jon M. Skovlin, Kenneth Hayes Myers, Llewelyn Williams, Norman Carroll Teter, Richard Lee Hiner, United States. Agricultural Research Service. Agricultural Engineering Research Division, United States. Department of Agriculture, Walter E. Peay, Warren Whitcomb, William J. Ash, William W. Neely, Benjamin F. Detroy, Jerome A. Onsager, John Wesley Rockey, Verne Elbert Davison, William O. Lee, Francis Leonard Timmons, Lawrence V. Compton

1964

by Arthur Truman Semple, Brittain Bragunier Robinson, C. A. Magoon, David Francis Costello, Eugene Amos Hollowell, Franklin Thomas Cowan, Helen Shepard Holbrook, Howard Wilfred Johnson, J. E. Dudley, James Herbert Beattie, James Robert McCalmont, John Frederick Preston, John L. Etchells, John Wesley Rockey, Joseph Frank Pechanec, Maurice S. Shahan, Roland McKee, Sears Polydore Doolittle, Stanley Ward McBirney, Thomas Ray Stanton, Verne Elbert Davison, Ward Tomlinson Huffman, Albert Victor Krewatch, Benjamin Koehler, Dean Humboldt Rose, Elmer Snyder, Franklin Arthur Coffman, George Edgar Ritchey, George Stewart, George Thomas Turner, Horace Jennings Shipman, Ivan D. Jones, John Andrew Johnson, Joseph Winslow Simons, Mason August Hein, T. E. Bronson, Claude Wakeland

1944