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Conservation. Glass gauges replacing steel. Markings on the handles of new glass gauges, which replace steel gauges at the Frankford Arsenal, are produced by acid etching. Glass gauges are lighter and cheaper than steel, permit greater visibility in inspection, are not as much affected by room tempe
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Credit lineConservation. Glass gauges replacing steel. Markings on the handles of new glass gauges, which replace steel gauges at the Frankford Arsenal, are produced by acid etching. Glass gauges are lighter and. 1943-01-01. United States. Office Of War Information, Hollem, Howard R.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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Conservation. Glass gauges replacing steel. Markings are carried on a label pasted on the handle of a glass plug gauge, which replace steel gauges at the Frankford Arsenal. Markings on other gauges are produced by acid etching. Glass gauges are lighter and cheaper than steel, permit greater visibili
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