Collection Contents

Allis-Chalmers (Milwaukee, WI), 1927

American Brass Company (Waterbury, CT), 1932

Anaconda Copper Mining Company (Butte, MT), ca. 1915

C. Kirk Hillman Company (Seattle, WA), ca. 1935

Colonial Steel Company (Pittsburgh, PA), 1925

Compressed Air Magazine, 1931

Deister Concentrator Company (Fort Wayne, IN), ca. 1920s-early 1930s

Denver Equipment Co. (Denver, CO), ca. 1930s

Dings Magnetic Separator Co. (Milwaukee, WI), ca. 1917

Dorr Company (New York City), 1928, 1930

E. J. Longyear Company (Minneapolis, MN), 1925

Galligher Company (Salt Lake City, UT), 1931

General Engineering Company, Inc. (Salt Lake City, UT and New York City), 1930

Hardinge Company (York, PA), 1925-1931

Hercules Powder Co. (Wilmington, DE), 1934

Lubrication, 1932

Merrill Company (San Francisco, CA), ca. 1925

Mine & Smelter Supply Co. (Denver, CO), 1934

Pan-American Engineering Corp. - Bunting Iron Works (San Francisco and Berkeley, CA), n.d.

Power, 1911

Ross Screen and Feeder Co. (New York City), 1930

Smith Engineering Works (Milwaukee, WI), ca. 1920s-early 1930s

Southwestern Engineering Corporation (Los Angeles, CA), ca. 1920s

Traylor Vibrator Company (Denver, CO), n.d.