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open access

Approximate Quantitative Microscopy of Pulverized Ores, Including the Use of the Camera Lucida

Description: Technical paper issued by the Bureau of Mines over microscopy of pulverized ores. As stated in the introduction, "this paper, which deals with the study of pulverized ores and the use of the camera lucida in such work, discusses an investigation undertaken at the Seattle and the Golden mining experiment stations of the Bureau of Mines" (p. 3). This paper includes tables, illustrations, and photographs.
Date: October 1919
Creator: Coghill, Will H. & Bonardi, J. P.
open access

Underground Latrines for Mines

Description: Technical paper issued by the Bureau of Mines over the introduction of underground latrines in mines to increase sanitary conditions. The improvements made by underground latrines are presented and discussed. This paper includes photographs, and illustrations.
Date: October 1916
Creator: White, Joseph H.
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