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Methods of Preventing and Limiting Explosions in Coal Mines
Technical paper issued by the Bureau of Mines over safety prevention in coal mines. Preventing mine explosions is emphasized. Methods used in mine safety are discussed. This paper includes tables, illustrations, and photographs.
Date:
April 1915
Creator:
Rice, George S. & Jones, L. M.
System:
The UNT Digital Library
Revision of the American Marmots
Discusses history, nomenclature, common names, habits, external characters, and specimens of American marmots. Describes, lists locations, and provides a key to species and subspecies.
Date:
April 7, 1915
Creator:
Howell, Arthur H.
System:
The UNT Digital Library