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Beef Production in the Corn Belt (open access)

Beef Production in the Corn Belt

This bulletin discusses beef production in the Corn Belt of the United States with special regard to feed preparation, cattle selection, and methods for fattening cattle.
Date: 1921
Creator: Black, W. H. (William Henry), 1888-1949
Object Type: Pamphlet
System: The UNT Digital Library
Gas Masks for Gases Met in Fighting Fires (open access)

Gas Masks for Gases Met in Fighting Fires

Technical paper issued by the Bureau of Mines over the development of gas masks designed for fighting fires. The characteristics of the different types of masks in development are presented. This paper includes tables, illustrations, and photographs.
Date: August 1921
Creator: Fieldner, Arno Carl; Katz, Sidney H. & Kinney, Selwyne P.
Object Type: Report
System: The UNT Digital Library