Sidney Hershberg Katz / Alan Leighton / Arno Carl Fieldner / Charles Herman Fulton / E. J. Hoffman / G. B. Taylor / George Arthur Burrell / Harold Hayward Clark / Henry Kreisinger / J. K. Clement / John Armstrong Watkins / O. C. Ralston / Ralph Walter Stone / United States. Bureau of Mines / United States. Department of the Interior / Walter A. Selvig / A. W. Gauger / C. E. Augustine / Henry Cyrus Porter / I. W. Robertson / J. J. Rutledge / J. N. Lawrence / W. C. Cope / Daniel Harrington / Fred Davidson Osgood | 