General view of an unidentified apparatus, possibly a hopper or type of granulation equipment, at an unidentified U.S. Department of Agriculture facility, likely the U.S.D.A.'s Agricultural Engineering Laboratory. Three specimen jars, likely containing fertilizer and/or soil samples, are visible beneath the apparatus.
|Original file type||TIFF|
|Rights||No Copyright - United States|
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“Apparatus at U.S. Department of Agriculture Facility,” 1950–1959. Travis P. Hignett Collection of Fixed Nitrogen Research Laboratory Photographs, Box 4. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/4j03cz67q.
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