Public domain
Conservation. Glass gauges replacing steel. Checking the inside diameter of a cartridge case with one of the glass gauges, which are replacing steel gauges at the Frankford Arsenal. Glass gauges are lighter and cheaper than steel, permit greater visibility in inspection, are not as much affected by
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Credit lineConservation. Glass gauges replacing steel. Checking the inside diameter of a cartridge case with one of the glass gauges, which are replacing steel gauges at the Frankford Arsenal. Glass gauges are l. 1943-01-01. Hollem, Howard R., United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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