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Ben Bow chromite mill, Stillwater County, Montana. The Oliver filter where the concentrates after the tabling process are separated from the water which they contained; the residue is then partially dried and is ready for shipment

Ben Bow chromite mill, Stillwater County, Montana. The Oliver filter w...

Public domain photograph of 1930s industry, war production in the United States free to use, no copyright restrictions image - Picryl description

Residue from Molybdenum Company mine. Climax, Colorado

Residue from Molybdenum Company mine. Climax, Colorado

Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description

Residue from Molybdenum Company mine. Climax, Colorado

Residue from Molybdenum Company mine. Climax, Colorado

Public domain photograph of United States countryside, nature, during 1930s, free to use, no copyright restrictions image - Picryl description

Old mine tipple and residue. Ghost town near Georgetown, Colorado

Old mine tipple and residue. Ghost town near Georgetown, Colorado

Public domain photograph of Washington DC, 1930s, free to use, no copyright restrictions image - Picryl description

Discarded stockings go to war. How powder bags are used. Placed into the breach of a major caliber gun, the bags, filled with powder, propel the projectile. Silk bags are used to insure complete absence of residue after explosion

Discarded stockings go to war. How powder bags are used. Placed into t...

Public domain photograph of 1930s industry, war production in the United States free to use, no copyright restrictions image - Picryl description

Science and research. Mineral prospecting. Chemical prospecting for oil becomes more and more important as the war goes on the demand for oil increases. Petroleum engineers call chemical prospecting the first scientific approach to the detection of oil in the earth. The big glass condensers, with which these engineering students are working with a professor of geophysics are used in a soil analysis test. The percentage of wax left as residue at the end of the experiment indicates the nearness of petroleum to the site from which the soil sample was taken. Colorado School of Mines, Golden, Colorado

Science and research. Mineral prospecting. Chemical prospecting for oi...

Public domain photograph - United States during World War Two, free to use, no copyright restrictions image - Picryl description

Conversion. Rendering of household fats. Moisture and foreign matter from reclaimed household greases are drained from cookers into open vats at a rendering plant. The liquid next drains into a settling tank where additional tallow is recovered. The residue becomes cracklings, consisting of meat, bones and some fats, and will be used as animal food

Conversion. Rendering of household fats. Moisture and foreign matter f...

Public domain photograph of indoor, interior activity, America in the 1930s, free to use, no copyright restrictions image - Picryl description

Rocky Mountain Arsenal, Distilled Mustard Residue Burner, 500 feet South of December Seventh Avenue; 1200 feet East of D Street, Commerce City, Adams County, CO

Rocky Mountain Arsenal, Distilled Mustard Residue Burner, 500 feet Sou...

Survey number: HAER CO-21-BR Public domain photograph - historical image of Colorado, United States, free to use, no copyright restrictions image - Picryl description

Residue from Molybdenum Company mine. Climax, Colorado

Residue from Molybdenum Company mine. Climax, Colorado

Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description

Rocky Mountain Arsenal, Distilled Mustard Residue Burner, 500 feet South of December Seventh Avenue; 1200 feet East of D Street, Commerce City, Adams County, CO

Rocky Mountain Arsenal, Distilled Mustard Residue Burner, 500 feet Sou...

Survey number: HAER CO-21-BR Public domain photograph - historical image of Colorado, United States, free to use, no copyright restrictions image - Picryl description

Residue from Molybdenum Company mine. Climax Colorado

Residue from Molybdenum Company mine. Climax Colorado

Public domain photograph of a mountain pass, mountains, nature, mountain range, view, landscape, rocks, free to use, no copyright restrictions - Picryl description