Search Results
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Employees at work in Fixed Nitrogen Research Laboratory electrical shop
- Circa 1928
General view of the electrical shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory showing assorted machinery and apparatus. The man visible on the left-hand side of the photograph is…
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F.F. Robey at work in carpenter shop at Fixed Nitrogen Research Laboratory
- Circa 1928
General view of F.F. Robey at work in the carpenter shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory showing assorted machinery and apparatus.
The Fixed Nitrogen Research Laboratory…
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Electrolytic cells for the production of hydrogen
- Circa 1928
General view of electrolytic cells used for the production of hydrogen at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen Research Laboratory…
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Repair shop at the Fixed Nitrogen Research Laboratory
- Circa 1928
General view of the repair shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory showing assorted machinery and apparatus.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at…
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Control board for catalyst testing system
- Circa 1928
General view of the control board for the catalyst testing system 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.)…
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Apparatus used for reaction of active nitrogen
- Circa 1928
General view of apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory for the reaction of active nitrogen with carbon monoxide, carbon dioxide, and oxygen and hydrogen gas.
The Fixed…
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Use of silica gel in arc process
- Circa 1928
General view of the apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory to introduce silica gel into an arc process. In the early 20th century, the arc process, in which electric…
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Reaction bombs for testing of catalysts
- Circa 1928
General view of reaction bombs used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory to test catalysts at 100 atmospheres of pressure. Numbers are visible on the exterior of the various…
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Crackers, deoxidizers, and scrubbers at catalyst testing plant
- Circa 1928
General view of crackers, deoxidizers, and scrubbers at the Fixed Nitrogen Research Laboratory's catalyst testing plant. Numbers are visible on the exterior of the various containers.
The Fixed Nitrogen Research…
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High-pressure purification apparatus at catalyst testing plant
- Circa 1928
General view of high-pressure purification apparatus used at the Fixed Nitrogen Research Laboratory's catalyst testing plant.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American University in…
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Gas storage facility at catalyst testing plant
- Circa 1928
General view of the exterior of the gas storage facility at the Fixed Nitrogen Research Laboratory's catalyst testing plant. Two unidentified workers are visible on the right-hand side of the photograph. A sign reading…
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Apparatus for water-gas catalysts
- Circa 1928
Apparatus for the production of catalysts used to initiate water-gas shift reactions at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The water-gas shift reaction…
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Stirring machine designed at Arlington Experimental Farm
- Circa 1928
View of a stirring machine designed at the Arlington Experimental Farm in Arlington, Virginia. Established by an act of Congress in April 1900, Arlington Farm served as the main field laboratory for the Bureau of Soils,…
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Samples of commercial fertilizer and concentrated fertilizer mixtures
- Circa 1928
Four stoppered jars containing samples of commercial fertilizer and concentrated fertilizer mixtures produced at the Arlington Experimental Farm in Arlington, Virginia. Established by an act of Congress in April 1900,…
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Apparatus for testing of catalysts
- Circa 1928
General view of apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory to test catalysts at 30 atmospheres of pressure.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was…
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Shaking machine designed at Arlington Experimental Farm
- Circa 1928
View of a shaking machine designed at the Arlington Experimental Farm in Arlington, Virginia. Established by an act of Congress in April 1900, Arlington Farm served as the main field laboratory for the Bureau of Soils,…
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Apparatus for the study of adsorption of gases on catalysts
- Circa 1928
General view of an apparatus used to study the adsorption of gases on catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Adsorption refers to a surface…
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L. Pinck using liquid air condenser for low-temperature distillations
- 1928-Aug-21
General view of Mr. L. Pinck demonstrating use of a liquid air condenser employed for low-temperature distillations at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
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Model of a synthetic ammonia plant
- Circa 1928
General view of a table-top model of a synthetic ammonia plant showing an assortment of plant machinery and apparatus. The model was created by the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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E.J. Fox with towers used for absorption of nitric oxides
- 1928-Aug-21
General view of E.J. Fox demonstrating use of towers to facilitate the absorption of nitric oxides by phosphate rock at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.…
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E.J. Fox operating rotary tunnel for absorption of nitric oxides
- 1928-Aug-21
General view of E.J. Fox demonstrating use of a rotary tunnel to facilitate the absorption of nitric oxides by ground phosphate rock at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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Thermostat and apparatus for measuring vapor pressures
- 1928-Aug-21
General view of the thermostat and apparatusused to measure vapor pressures in the study of Urea synthesis at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Urea is a…
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Thermostat, apparatus, and analytical train
- 1928-Aug-21
General view of the thermostat, apparatus, and analytical train used to measure vapor pressures in the study of Urea synthesis at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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Portrait of William McPherson (1864-1951)
- Circa 1928
Portrait of William McPherson (1864-1951). McPherson was a professor of chemistry and dean of the graduate school at Ohio State University. He served as chairman of the American Chemical Society from 1895 to 1928, as…
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Portrait of Herbert Freundlich (1880-1941)
- 1920s – circa
Portrait of Herbert Freundlich (1880-1941). A student of Wilhelm Ostwald, Freundlich received his doctorate from the University of Leipzig in 1903 following his dissertation on the precipitation (coagulation) of colloid…
