Electrometallurgy. Progress reports, Metallurgical Division: 23, Electrometallurgical investigations. Electrolytic manganese, by S. M. Shelton, M. B. Royer, and A. P. Towne; Boulder City, Nov., electrometallurgical laboratory, by J. Koster and R. G. Knickerbocker: Pullman, Wash., unit, Electrometallurgical Section, by H. A. Doerner.