Charles George Maier / Eugene Delos Gardner / L. C. Ilsley / United States. Bureau of Mines / William Carroll Schroeder / William Waugh Adams / Abraham Albert Berk / Alva Britt Hooker / J. R. Thoenen / L. E. Geyer / M. E. Kolhos / McHenry Mosier / Virginia E. Wrenn / M. G. Parry / S. L. Windes / William Henry Roadstrum | 