Public domain
Science and research. Studies of non-coking coals. William S. Landers, assistant chemical engineer at the Golden, Colorado field station of the U.S. Bureau of Mines, takes a reading from moisture distillation apparatus which determines the water content of coal. Most western coal is high in oxygen a
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Credit lineScience and research. Studies of non-coking coals. William S. Landers, assistant chemical engineer at the Golden, Colorado field station of the U.S. Bureau of Mines, takes a reading from moisture dist. 1942-01-01. United States. Office Of War Information, Feininger, Andreas. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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