Skip to Content
You searched for
Search
Subject United States. Department of Agriculture Remove constraint Subject: United States. Department of Agriculture

Search Constraints

Search Results

    • 1926-Apr

    Two views of an apparatus used to oxidize ammonia with pure oxygen using bed catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The individual visible in the…

    • 1930-May-28

    Two views of the construction of the phosphoric acid furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. This furnace was used to make phosphoric acid through…

    • 1930-Mar-21

    Assorted views of slag being tapped from the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The individuals visible in the photographs…

    • 1926-Apr

    Two views of the exterior of the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facility located at American University near Washington, D.C. The Fixed Nitrogen Research Laboratory (F.N.R.L.) was…

    • circa 1928

    Two views of an apparatus used to oxidize ammonia at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.

    The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established…

    • 1926-Apr

    Two views of an apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory to test catalysts at 1 to 100 atmospheres of pressure. Key components of the apparatus are visible in the…

    • 1926-Apr

    Two views of an apparatus used to measure the solubility of methane in hydrocarbons under high pressures at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The…

    • 1926-Apr

    Two views of the Instrument Shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory showing assorted machinery and tools. The individual visible in the photographs is identified as Mr. J.E.…

    • 1926-Apr

    Two views of the Instrument Shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory showing assorted machinery and tools. The individual visible in the photographs is identified as Mr. J.E.…

    • circa 1928

    Two views of an apparatus used to determine the hygroscopicity of fertilizer materials and mixtures at the the Arlington Experimental Farm in Arlington, Virginia. The individual visible in the first photograph is…

    • 1930-Jan-08

    Two views of a thermostated agitating device with an all-glass system used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The term "thermostated" refers to a…

    • 1928-Aug-21

    Three views of the carbon monoxide generator and compressor used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The individual visible in the second and third…

    • circa 1926

    Two views of the U.S. Department of Agriculture's exhibition display at the Chemical Industries Exposition in New York. Highlighting the work of the Fixed Nitrogen Research Laboratory, the display includes panels on…

    • 1926

    Two views of an exhibition display concerning the work of the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The display includes assorted sample jars and a photograph…

    • 1920

    Two views of the exterior of the Fixed Nitrogen Research Laboratory facilities located at American University near Washington, D.C. The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American…

    • 1950s

    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…

    • 1950s – circa

    Two views of a chemist inserting radioactive materials into an apparatus at an unidentified U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing,…

    • 1950s – circa

    General view of fertilizer trays on a suspension apparatus at an unidentified U.S. Department of Agriculture facility.

    • circa 1935

    General view of assorted equipment and apparatus in the Constant Humidity Room at the the U.S. Department of Agriculture's Fertilizer Machinery Laboratory located at the Arlington Experimental Farm in Rosslyn…

    • 1950s – circa

    General view of a drillability apparatus with fertilizer hoppers, a starwheel, and rotating plate mechanism at an unidentified U.S. Department of Agriculture facility.

    • 1950s – circa

    General view of a chemist handling radioactive material at an unidentified U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing, including the…

    • 1950s – circa

    View of chemist George Wieczorek (left) and an unidentified chemist using a Geiger counter to measure ionizing radiation in radioisotopes at an unidentified U.S. Department of Agriculture facility. A box of…

    • 1950s – circa

    View of chemist George Wieczorek (right) and an unidentified chemist using a Geiger counter to measure ionizing radiation in an unknown substance at a U.S. Department of Agriculture facility. The U.S.D.A. commonly used…

    • 1950s – circa

    General view of a chemist handling radioactive material at an unidentified U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing, including the…

    • 1932-Jan-19

    Three views of the Engine Room at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. showing assorted machinery and apparatus.

    The Fixed Nitrogen Research Laboratory…