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Subject Scales (Weighing instruments) Remove constraint Subject: Scales (Weighing instruments)

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    • 1940s

    General view of weigh-tanks for caustic soda and ethyl cellulose at the Hercules Powder Company's Ethyl Cellulose plant in Hopewell, Virginia. Per notations accompanying the photograph, caustic soda and ethyl cellulose…

    • 1955

    General view of first class operator Sylvester (Syl) Demskie weighing diazo and potassium chlorate in the mix house at the Hercules Powder Company plant in Port Ewen, New York. Diazo and potassium chlorate were two…

    • circa 1949

    General view of the Rubber Ingredient and Weigh-Up Room at the Naval Air Experimental Station. Adjacent to the Rubber Compounding and Processing Laboratory, the room contained cupboards and bins housing over…