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Copper Mining in North America
From introduction: "In this paper are assembled and summarized many subjects relating to the copper industry in North America. Production of mines and districts, history of the industry in North America. Production of mines and districts, history of the industry, geology, of the principal deposits, and mining methods and costs are discussed."
Date:
1938
Creator:
Gardner, E. D.; Johnson, C. H. & Butler, B. S.
System:
The UNT Digital Library
Carbonizing Properties: British Columbia, Matanuska Valley (Alaska), and Washington Coals and Blends of Six of Them with Lower Sunnyside (Utah) Coals
From Introduction and Summary: "This report gives results of an investigation of the carbonizing properties of 18 coals, including 2 from Alaska, 12 from British Columbia, 3 from Washington, and 1 from Utah. Each coal was carbonized in the standard 13-inch Bureau of Mines-American Gas Association (BM-AGA) retort at 900 degrees C."
Date:
1952
Creator:
Davis, J. D.; Reynolds, D. A.; Brewer, R. E.; Naugle, B. W.; Wolfson, D. E.; Gibson, F. H. et al.
System:
The UNT Digital Library