Search Results
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Apparatus for making nitric acid from nitrogen dioxide
- Circa 1928
General view of an apparatus used to make nitric acid from nitrogen dioxide 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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Apparatus to remove carbon dioxide from water gas
- Circa 1928
General view of an apparatus used to remove carbon dioxide from water gas, a mixture of carbon monoxide and hydrogen, at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington,…
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High-pressure circulating pump
- Circa 1928
General view of a high-pressure circulating pump used 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…
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High-pressure pump
- Circa 1928
General view of a high-pressure pump used 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 at…
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Silica gel adsorber for nitrogen dioxide
- Circa 1928
General view of an apparatus used to facilitate the adsorption of silica gel and nitrogen oxide at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Adsorption refers to…
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Apparatus for making urea from ammonium carbamate briquettes
- Circa 1928
General view of an apparatus used to make urea from ammonium carbamate briquettes at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Urea is a water-soluble powder…
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Colorimeter for nitrogen dioxide analysis
- Circa 1928
General view of a colorimeter used to analyze nitrogen dioxide at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. With regards to chemistry, colorimeters are used to…
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High-pressure pump
- Circa 1928
General view of a high-pressure pump used 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 at…
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Conference room at the Fixed Nitrogen Research Laboratory
- Circa 1928
General view of a conference room 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 at American…
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Electron inertia apparatus
- Circa 1928
General view of the electron inertia apparatus used 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…
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Compressors used at catalyst testing plant
- Circa 1928
General view of the compressors 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 1919 under the…
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Library at the Fixed Nitrogen Research Laboratory
- Circa 1928
General view of the library 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 at American…
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Auxiliary gasoline engine at catalyst testing plant
- Circa 1928
General view of the auxiliary gasoline engine used at the Fixed Nitrogen Research Laboratory's catalyst testing plant. The insignia of the General Motors Company is visible at the base of the engine.
The Fixed Nitrogen…
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Apparatus used to remove ammonia
- Circa 1928
General view of an apparatus used to remove 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…
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Apparatus used to test catalysts
- Circa 1928
General view of an apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory to test catalysts under one atmosphere of pressure.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was…
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Apparatus for studying absorbents for high-pressure ammonia system
- Circa 1928
General view of an apparatus used to study absorbents for a high-pressure ammonia system at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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Apparatus for the study of liquid absorbents for ammonia
- Circa 1928
General view of an apparatus used to study liquid absorbents for ammonia 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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J.J. Connor at work in Fixed Nitrogen Research Laboratory
- Circa 1928
General view of acetylene welding at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The man visible in the photograph is identified as J.J. Connor. This photograph is…
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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…