United States. Bureau of Standards / Bruce Allison Rogers / Campbell Easter Waters / Edward Max Schenke / Elmer Line Peffer / Elmer Rupel Weaver / F.W. Smither / Gordon Mabey Kline / Irvine Clifton Gardner / Lawrence A. Wood / Martin Shepherd / Paul R. Heyl / Ralph Edgar Gould / Raymond Laraway Sanford / Richard Sewall Hunter / Roy Clement Bowker / Thora M. Plitt Hardy / William Weber Coblentz / Howard E. Shearer / Irl Corley Schoonover / Ralph Stair / V. L. Chrisler / Louis Jordan | 