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Leaching Oxidized Copper Ores: Effect of Strength of Acid in Leaching Solvent
Report issued by the U.S. Bureau of Mines on the leaching of copper ores. The different strengths and cycles of solvents to extract impurities from the ore are presented. This report includes tables and graphs.
Date:
July 1931
Creator:
Sullivan, John D. & Oldright, G. L.
System:
The UNT Digital Library
Coal-Mine Fatalities in June, 1931
Report issued by the U.S. Bureau of Mines on the coal mine related deaths that occurred during the month of June, 1931. The number of fatalities and the causes of each are presented. This report includes tables and a graph.
Date:
July 1931
Creator:
Adams, William Waugh & Chenoweth, L.
System:
The UNT Digital Library