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Small-scale continuous granulation equipment
- Circa 1953
General view of small-scale continuous granulation equipment used at the U.S. Department of Agriculture's Agricultural Engineering Laboratory.
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Shell Chemical Corporation barge
- Circa 1953
General view of the Shell Corporation's oceanic barge, known as "Ammonia Mariner." The barge was used to transport approximately 50,000 tons of ammonia fertilizer each year from Pittsburg, California to storage…
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Granulation equipment at the Agricultural Engineering Laboratory
- Circa 1953
General view of granulation equipment used at the U.S. Department of Agriculture's Agricultural Engineering Laboratory located in Beltsville, Maryland. This equipment is believed to have been used by chemist John O.…
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Fertilizer storage piles at the Agricultural Engineering Laboratory
- Circa 1953
General view of fertilizer storage piles supported between uprights at the U.S. Department of Agriculture's Agricultural Engineering Laboratory. Text accompanying the photograph notes that each row contained a full set…
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Drillability apparatus at the Agricultural Engineering Laboratory
- Circa 1953
General view of an unidentified room at the U.S. Department of Agriculture's Agricultural Engineering Laboratory showing a drillability apparatus with fertilizer hoppers, a starwheel, and rotating plate mechanism.
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Fertilizer trays at the Agricultural Engineering Laboratory
- 1953-Jul-15
General view of the trays used to expose fertilizer to humidity in the Air Control Room at the U.S. Department of Agriculture's Agricultural Engineering Laboratory.
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Fertilizer bags at Agricultural Engineering Laboratory
- 1953-Jul-15
General view of the Air Control Room at the U.S. Department of Agriculture's Agricultural Engineering Laboratory showing three bags of fertilizer in storage under three bags of sand.
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Group portrait of U.S. Department of Agriculture personnel
- 1952-May
Group photograph of unidentified female personnel at an unidentified United States Department of Agriculture facility. A large board bearing a sheaf of wheat is visible in front of the group.
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2 items
U.S. Department of Agriculture personnel
- 1952-Mar-04
Group photograph of U.S. Department of Agriculture personnel at an unidentified facility. The individuals in the photograph are identified as follows:
Standing (left to right): Richard Bradfield; S. S. Obenshain;…
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Unidentified U.S.D.A. building
- 1940s – circa
Exterior view of an unidentified United States Department of Agriculture building. The building is believed to be part of the U.S.D.A.'s Agricultural Engineering Laboratory facility located in Beltsville, Maryland.
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U.S. Department of Agriculture personnel
- 1940s
Group photograph of U.S. Department of Agriculture personnel at an unidentified facility. The individuals in the photograph are identified as follows:
Standing (left to right): Mr. Whittaker; Louise Gardner; J. R.…
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Richard C. Tolman (1881-1948)
- 1945
Photograph of mathematical physicist and physical chemist Richard C. (Chace) Tolman seated in front of a global map. This photograph is believed to have been taken when Tolman was serving as a scientific advisor to…
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International Fertilizer Distributor machine
- 1944-Jul-14
General view of an International Fertilizer Distributor (No. 49 Machine) in use at the U.S. Department of Agriculture's Plant Industry Station facility in Beltsville, Maryland. This machine was used to determine the…
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Agricultural Engineering Laboratory
- 1943-Dec-09
Exterior view of the U.S.D.A.'s Agricultural Engineering Laboratory located in Beltsville, Maryland. The laboratory was predominately used for practical investigations related to plants and fertilizers in support of the…
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2 items
U.S. Department of Agriculture facilities
- 1940-Aug-23
Two exterior views of unidentified facilities believed to be associated with the U.S. Department of Agriculture.
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Portrait of Henry G. Knight
- 1930s
Portrait of Dr. Henry G. Knight, Chief of the U.S. Department of Agriculture's Bureau of Chemistry & Soils.
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2 items
Experimental blast furnace on burden of phosphate
- 1930s
Two views of the experimental blast furnace on a burden (a load, especially a heavy one) of phosphate at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory plant.
The Fixed Nitrogen Research…
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3 items
Experimental blast furnace on burden of phosphate
- 1930s
Three views of the experimental blast furnace on a burden (a load, especially a heavy one) of phosphate at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory plant.
The Fixed Nitrogen Research…
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Experimental blast furnace at Fixed Nitrogen Research Laboratory plant
- 1930s
General view of an experimental blast furnace at a U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory plant. The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American University in…
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Employee at work in raw material storage at Fixed Nitrogen Research Laboratory plant
- 1930s
General view of an unidentified worker sorting raw material, possibly ore or phosphate, at a Fixed Nitrogen Research Laboratory plant. The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American…
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Apparatus at Fixed Nitrogen Research Laboratory
- 1930s
General view of an unidentified apparatus, possibly a pump or compressor, used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen Research…
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2 items
Aerial view of U.S. Department of Agriculture facilities
- 1936
Two aerial views of the U.S. Department of Agriculture complex located in Washington, DC. The second photograph was taken during the construction of the Administration Building and East and West Wings. The in-progress…
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Machine shop at the Fertilizer Machinery Laboratory
- 1935
General view of the machine shop at the U.S. Department of Agriculture's Fertilizer Machinery Laboratory located at the Arlington Experimental Farm in Rosslyn [Arlington], Virginia. Established by an act of Congress in…
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Indoor soil track at Fertilizer Machinery Laboratory
- 1935
General view of the indoor soil track used in the U.S. Department of Agriculture's Fertilizer Machinery Laboratory located at the Arlington Experimental Farm in Rosslyn [Arlington], Virginia. Measuring 9 feet wide by 70…
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Fertilizer testing apparatus mounting frame and driving mechanisms
- 1935
Close-up view of the mounting frame and driving mechanisms of the fertilizer distribution testing apparatus used in the U.S. Department of Agriculture's Fertilizer Machinery Laboratory located at the Arlington…