Official Changes in the Active List of Permissible Explosives and Blasting Devices for August, 1930

1930-1931

by Charles Holmes Herty, A. J. Kraemer, A. U. Miller, Arno Carl Fieldner, Charles Wesley Davis, Clarence Watson Owings, F. D. DeVaney, G. W. Jones, George Samuel Rice, Gordon Ray Hopkins, Harry Blackburn Hill, Helmuth Herman Schrenk, Henry Alfred Doerner, Henry Herman Storch, John D. Sullivan, John Gross, Joseph Chalmers, L. B. Berger, N. A. Tolch, R. L. Marek, Scott Turner, William Parks Yant, Alfred P. Towne, E. V. H. Bauserman, G. L. Oldright, G. St. J. Perrott, Harold Putnam Greenwald, J. B. Clemmer, J. E. Conley, S. R. Zimmerley, W. A. Selvig, W. H. Coghill, C. B. Carpenter, F. A. Patty, Henry C. Howarth, M. B. Royer, W. E. Keck, W. H. Frederic