General view of employees observing the temperature inside the Royster stoves at the Fixed Nitrogen Research Laboratory's experimental blast furnace plant during a Tennessee Valley Authority (T.V.A.) operation.
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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“Observing Temperature inside Royster Stoves at Experimental Blast Furnace,” April 5, 1934. Travis P. Hignett Collection of Fixed Nitrogen Research Laboratory Photographs, Box 3. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/bv73c073m.
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