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, uses precision gas analysis apparatus which measures the properties of gas made in a coke oven. This is important, since gas is a usab
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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, uses precision gas analysis appara. 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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