Albert Booth Needham / Carlton Ernest Brown / Charles L. Harness / Claude W. Sill / Daniel Harrington / Douglas H. Platt / Ernest J. Gleim / Frank Errette Cash / Harold Manton Smith / Henry P. Wheeler / Irving Kabik / J. H. East / R. D. Leitch / Sara Jeannette Davenport / Simon Harry Ash / Vsevolod L. Skitsky / W. Ayvazoglou / William J. Kroll / William Samuel Landers / William W. Odell / United States. Bureau of Mines / A. W. Schlechten / E. L. Baldeschwieler / F. M. Barsigian / Heber E. Peterson / James Westfield / P. R. Moyer / Ralph Homeward Espach / Robert L. Beatty / Russell G. Warncke / W. Cone Holliman / W. T. Reid / William Joseph Fene / T. B. Kirby | 