2 Matching Results

Search Results

open access

Geophysical Prospecting: Some Electrical Methods

Technical paper issued by the Bureau of Mines over experiments in electrical methods. The methods and equipment used are presented and described. This paper includes tables, illustrations, and photographs.

Date: 1928

Creator: Eve, A. S. & Keys, D. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Treatment of the Tungsten Ores of Boulder County, Colo.

Report discussing the the development of milling practice in Boulder County, the ore-dressing methods in use, and the local manufacture of ferrotungsten and tungstic oxide. Figures giving the production of tungsten concentrates in the Boulder district, in the United States, and in the world; data on the buying of tungsten ores; costs of production; and the normal tungsten requirements in this country are presented.

Date: October 1921

Creator: Bonardi, J. P. & Williams, J. C.