Search Results
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Dr. Leatherman determining amount of inert gas in nitrogen
- 1928-Aug-21
General view of Dr. Leatherman using an apparatus to determine the amount of inert gas present in nitrogen made from the fractionation of liquid air at the Fixed Nitrogen Research Laboratory's High-Pressure Laboratory. …
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Compressor used in carbon dioxide refrigeration system
- 1928-Aug-21
General view of compressor used in the carbon dioxide refrigeration system at the Fixed Nitrogen Research Laboratory's High-Pressure Laboratory. The individual present in the photograph is identified as Mr. Tremearne.
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Apparatus used to analyze hydrogen
- Circa 1928
General view of an apparatus used to analyze hydrogen at the Fixed Nitrogen Research Laboratory's Synthetic Ammonia Division.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American University in…
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Hydraulic pressure pump and other laboratory apparatus
- 1928-Aug-21
General view of assorted apparatus used in the Fixed Nitrogen Research Laboratory's High-Pressure Laboratory, including a hydraulic pressure pump, piston-type gauges, high-pressure booth, and valve manifold. The…
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Thermostat and equipment used to measure volume of gas
- 1928-Aug-21
General view of the thermostat and other equipment used to measure gas volumes in order to make compressibility determinations at the High-Pressure Laboratory, part of the U.S. Department of Agriculture's Fixed…
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Apparatus to study the compressibility of gases
- Circa 1928
General view of the thermostat and assorted apparatus used to study the compressibility of gases at high pressures at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. …
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Thermostat and equipment for determining compressibility
- 1928-Aug-21
General view of a thermostat and equipment used to determine the compressibility of gas at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. In chemistry,…
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Barometers and potentiometer at the Fixed Nitrogen Research Laboratory
- 1928-Aug-21
Mr. Hetherington demonstrating the barometers and potentiometer used for temperature control at the High-Pressure Laboratory, part of the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facilities…
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Measurement of gas volumes at Fixed Nitrogen Research Laboratory
- 1928-Aug-21
General view of the apparatus used to measure gas volumes in order to make compressibility determinations at the High-Pressure Laboratory, part of the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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Apparatus for studying the thermal decomposition of ammonia
- 1928-Aug-21
General view of an apparatus used to study the thermal decomposition of ammonia of the surface of tungsten, molybdenum, nickel, and iron catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research…
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Compression and high-pressure storage cylinders
- 1928-Aug-21
General view of two compression and high-pressure storage cylinders used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Part of a hand-operated booster connected…
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Test tube for study of the activity of potassium ions and electrons
- 1928-Aug-21
General view of a test tube used to study the activity of potassium ions and electrons in the activation of nitrogen gas and hydrogen at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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Mounted French postage and semipostal stamps depicting Louis Pasteur
- 1922 – 1936
Nine small postage stamps in various denominations issued in commemoration of the 100th anniversary of the birth of Louis Pasteur in 1922. The large semipostal stamp was issued in 1936 and includes a surtax for the…
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General repair shop at the Fixed Nitrogen Research Laboratory
- Circa 1928
General view of the general repair shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facilities located in Washington, D.C.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was…
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Machine shop at the Fixed Nitrogen Research Laboratory
- Circa 1928
General view of the machine shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facilities located in Washington, D.C.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at…
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Cyanamide Laboratory
- Circa 1928
General view of the Cyanamide Laboratory at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facilities located in Washington, D.C. Assorted glassware and laboratory apparatus, including a…
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E.J. Fox and K.S. Love at work in Nitrogen Analytical Laboratory
- 1928 – circa
General view of E.J. Fox and K.S. Love at work in the Nitrogen Analytical Laboratory at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facilities located in Washington, D.C. Assorted glassware…
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Fixed Nitrogen Research Laboratory personnel
- Circa 1928
Group photograph of unidentified personnel from 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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Study of the thermal dissociation of sodium cyanide
- Circa 1928
General view of an apparatus used to study the thermal dissociation of sodium cyanide at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Thermal dissociation is…
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Study of the Bucher Process at the Fixed Nitrogen Research Laboratory
- Circa 1928
General view of an apparatus used to study the Bucher Process for the fixation of nitrogen at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Based on research…
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Absorption of nitrogen oxides by silica gel
- Circa 1928
General view of an apparatus used to study the absorption of nitrogen oxides by silica gel at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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High-frequency apparatus at the Fixed Nitrogen Research Laboratory
- Circa 1928
General view of a high-frequency apparatus used in the Fixed Nitrogen Research Laboratory's Arc Laboratory. In the early 20th century, the arc process, in which electric generators are used to combine nitrogen and…
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Thermostat for measuring rates of reaction
- Circa 1928
General view of a thermostat apparatus used to measure rates of reaction 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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Metallic contact apparatus
- Circa 1928
General view of a metallic contact apparatus, likely used to measure electrical contact between metallic objects, at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
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Diagram of an apparatus used to determine nitrogen in the presence of hydrogen
- Circa 1928
Diagram of an apparatus used to determine nitrogen in the presence of hydrogen. Several component parts of the apparatus are labelled, including a circulating device, combustion tube, and topler pump. The diagram itself…