Results of Assays of the New Albany Oil-Shale (open access)

Results of Assays of the New Albany Oil-Shale

Report issued by the U.S. Bureau of Mines on a survey of the New Albany oil-shale deposits in Indiana. The experimental procedures for surveying and sampling these shale deposits are presented in detail. This report includes tables, and graphs.
Date: June 1923
Creator: Reeves, John R.
System: The UNT Digital Library
Timbering of Metal Mines (open access)

Timbering of Metal Mines

Report issued by the Bureau of Mines over the importance of timbering in metal mines. The reasons and methods for timbering are presented and discussed. This report includes illustrations, and photographs.
Date: June 1923
Creator: Holbrook, Elmer Allen; Ageton, Richard V. & Tufft, Harry E.
System: The UNT Digital Library
Comparison of Gas Masks, Hose Masks, and Oxygen-Breathing Apparatus (open access)

Comparison of Gas Masks, Hose Masks, and Oxygen-Breathing Apparatus

Report providing information about the most appropriate kinds of breathing apparatus -- gas masks, hose masks, or self-contained oxygen-breathing apparatus -- to use in different situations.
Date: June 1923
Creator: Katz, S. H. & Bourquin, J. J.
System: The UNT Digital Library