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Approved Electric Lamps for Miners

Description: From introduction: "The Bureau of Mines calls attention to the dangers of open-flame lamps in any coal mine."
Date: July 1917
Creator: Clark, H. H. & Ilsley, L. C.
Partner: UNT Libraries Government Documents Department
open access

Approved Electric Lamps for Miners

Description: Report describing the development of a number of types of lamps for miners that meet the requirements of the Bureau of Mines. Discusses the features and qualities of these lamps in detail.
Date: July 1917
Creator: Clark, H. H. & Ilsley, L. C.
Partner: UNT Libraries Government Documents Department
open access

Gypsum Products: Their Preparation and Uses

Description: Technical report issued by the Bureau of Mines over the different uses of gypsum. The sources and uses of gypsum are presented and discussed. This report includes tables, photographs, and illustrations.
Date: July 1917
Creator: Stone, Ralph W.
Partner: UNT Libraries Government Documents Department
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