Search Results
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2 items
C.A. Black with apparatus for measuring the solubility of methane
- 1926-Apr
Two views of Mr. C.A. Black with 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…
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2 items
J.E. Reuter at work in instrument shop at Fixed Nitrogen Research Laboratory
- 1926-Apr
Two views of J.E. Reuter at work in the instrument shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory showing assorted machinery and tools.
The Fixed Nitrogen Research Laboratory…
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2 items
J.E. Reuter at work in instrument shop at Fixed Nitrogen Research Laboratory
- 1926-Apr
Two views of J.E. Reuter at work in the instrument shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory showing assorted machinery and tools.
The Fixed Nitrogen Research Laboratory…
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2 items
Apparatus for determining the hygroscopicity of fertilizer materials
- 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…
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2 items
Thermostated agitating device
- 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…
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3 items
Carbon monoxide generator and compressor
- 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…
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2 items
U.S. Department of Agriculture exhibition display
- 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…
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2 items
Fixed Nitrogen Research Laboratory exhibition display
- 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…
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2 items
Exterior view of the Fixed Nitrogen Research Laboratory
- 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…
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Constant Humidity Room at the Fertilizer Machinery Laboratory
- 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…
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3 items
Interior of Engine Room at the Fixed Nitrogen Research Laboratory
- 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…
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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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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…
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Constant Humidity Room at the Fertilizer Machinery Laboratory
- 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…
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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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Air-conditioning equipment at Fertilizer Machinery Laboratory
- 1935
General view of the air-conditioning equipment used in the U.S. Department of Agriculture's Fertilizer Machinery Laboratory located at the Arlington Experimental Farm in Rosslyn [Arlington], Virginia. This particular…
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Fertilizer distribution testing apparatus
- 1935
General view of the fertilizer distribution testing apparatus used in the U.S. Department of Agriculture's Fertilizer Machinery Laboratory located at the Arlington Experimental Farm in Rosslyn [Arlington], Virginia. The…
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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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Fertilizer Machinery Laboratory
- 1935-Nov
Exterior view of the Fertilizer Machinery Laboratory at the Arlington Experimental Farm in Rosslyn [Arlington], Virginia. Established by an act of Congress in April 1900, Arlington Farm served as the main field…
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2 items
Parts of an apparatus used to grow higher plants in a sterile medium
- 1930-Jan-08
Two views of the component parts of an apparatus used to grow higher plants in a sterile medium at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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2 items
Study of the effects of boric acid on soy beans
- 1927-Jul-26
Two views of culture samples used to study the effect of boric acid on the production of nodules upon the roots of soy beans grown under pure culture conditions at the U.S. Department of Agriculture's Fixed Nitrogen…
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Results of an experiment to determine if corn can secure nitrogen from air
- 1927-Jul-26
General view of culture samples used for an experiment to determine if corn can secure its nitrogen from the air if grown in the presence of nitrogen-fixing bacteria. This experiment was conducted at the U.S.…
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2 items
Thermocouple apparatus at the Fixed Nitrogen Research Laboratory
- 1930-Jan-08
Two views of a thermocouple apparatus and assorted components, including a micro-spot welder and soldiering pencil, at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. …
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Apparatus for studying the mechanism of nitrogen fixation
- 1930-Jan-08
General view of an apparatus used for the spectroscopic study of the mechanism of nitrogen fixation in the electric arc at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington,…
