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Coal-Washing Investigations: Methods and Tests

Description: From Introduction: "The investigations described in this bulletin are confined to a study of the washing characteristics of bituminous coals. The washing characteristics of coals from many of the most important coal-producing fields of the Eastern and Central States were examined."
Date: 1929
Creator: Yancey, H. F. & Fraser, Thomas
Partner: UNT Libraries Government Documents Department
open access

Leaching Nonsulphide Copper Ores with Sulphur Dioxide

Description: Report issued by the Bureau of Mines discussing the sulfurous acid leaching of the Southwest experiment station. Operations and analyses of the experiment station are presented. This report includes tables, illustrations, and photographs.
Date: May 1923
Creator: Van Barneveld, Charles E. & Leaver, Edmund S.
Partner: UNT Libraries Government Documents Department
open access

Review of State Mine Inspector's Reports as They Relate to Accidents from Falls of Roof

Description: Report issued by the U.S. Bureau of Mines over state mine inspection reports from 19 U.S. states. The information in the reports includes details of accidents, locations that specific accidents occurred, and proposed remedies for prevention of future accidents. This report includes tables.
Date: April 1929
Creator: Paul, James Washington
Partner: UNT Libraries Government Documents Department
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