Search Results
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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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Combination hot plate and shaker
- 1930-Jan-08
View of a combination hot plate and shaker used to investigate potash at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Potash salts are an important component in the…
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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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Absorption chamber for nitrogen oxides
- 1930-Jan-08
Absorption chamber for nitrogen oxides used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. In this photograph, the chamber's casing has been removed to show the…
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Apparatus for the analysis of vapors at the Fixed Nitrogen Research Laboratory
- 1930-Jan-08
Apparatus used to analyze vapors emitted from the reaction of liquid carbon dioxide and liquid ammonia at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. In the…
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Equipment for treating fertilizer raw materials with nitrogen oxides
- 1930-Jan-08
Equipment used to treat raw materials for the production of fertilizer with nitrogen oxides at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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General view of apparatus for determining total and partial vapor pressures
- 1930-Jan-08
General view of apparatus use to determine total and partial vapor pressures at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The apparatus was commonly used to…
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Apparatus for determining vapor pressure, with view of equilibrium chamber and isoteniscope
- 1930-Jan-08
Apparatus used to determine vapor pressure of vapor emitted from the reaction of liquid carbon dioxide and liquid ammonia at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington,…
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Apparatus for studying the thermal reaction of acetylene and nitrogen
- 1930-Jan-08
An apparatus used to study the thermal reaction of acetylene and nitrogen 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 for studying the thermal reactions in gases (with screen)
- 1930-Jan-08
An apparatus used to study thermal reactions in gases at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. A protective screen partially obscures the front of the…