General view of two compression and high-pressure storage cylinders used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Part of a hand-operated booster connected to the cylinders is visible on the right-hand side of the photograph.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American University in 1919 under the directorship of Arthur B. Lamb. Initially part of the War Department, the F.N.R.L. was the successor to several wartime initiatives to develop a secure domestic supply of nitrate compounds necessary for the manufacture of explosives during World War I. With a staff of about 110 individuals, including 35 to 50 chemists, the F.N.R.L. focused on the manufacture, production, and development of products of atmospheric nitrogen, including munitions and fertilizers.
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“Compression and High-Pressure Storage Cylinders,” August 21, 1928. Travis P. Hignett Collection of Fixed Nitrogen Research Laboratory Photographs, Box 2. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/g445cd30z.
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