General view of an apparatus used to determine the amount of inert gas present in nitrogen made from the fractionation of liquid air at the Fixed Nitrogen Research Laboratory's High-Pressure Laboratory. The individual present in the photograph is identified as Dr. Leatherman.
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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“Apparatus for Determining Amount of Inert Gas in Nitrogen,” August 21, 1928. Travis P. Hignett Collection of Fixed Nitrogen Research Laboratory Photographs, Box 2. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/x059c745c.
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