A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Black rock tungsten deposit, Mono county, Calif
Mine is 9.4 mi west of Hammil; physical features, history and production; Bureau of Mines project disclosed additional reserves; concentrates produced at rate of 10 to 12 bags (about 100 lb each of plus 65% concentrate) per day, as compared to previous rate of 4 bags; project work; sampling; use of violet ray lamp.
Black rock tungsten deposit, Mono county, Calif
Mine is 9.4 mi west of Hammil; physical features, history and production; Bureau of Mines project disclosed additional reserves; concentrates produced at rate of 10 to 12 bags (about 100 lb each of plus 65% concentrate) per day, as compared to previous rate of 4 bags; project work; sampling; use of violet ray lamp.
Black rock tungsten deposit, Mono county, Calif
U S Bur Mines -- Report Investigations
Dupuy, L.W. (author)
1948
6 pages
Supp Plates
Report
English
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