Search Results
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Portrait of Samuel Cox Hooker (1865-1935)
- 1920s – circa
Portrait of Samuel Cox Hooker (1865-1935). Hooker was born on April 19, 1865, in Benchley, Kent, England and studied at the Government Science School in South Kensington, London. Hooker earned his PhD from the…
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2 items
Apparatus used to oxidize ammonia
- Circa 1928
Two views of an apparatus used to oxidize 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 established…
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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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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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Postcard and French postage stamp commemorating Louis Pasteur
- After 1885 – before 1953
Postcard image is a reproduction of Finnish painter Albert Edelfelt's famed portrait "Pasteur Dans Son Laboratoire" [Pasteur In His Laboratory]. The portrait depicts Pasteur in his laboratory at the rue d'Ulm,…
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Decomposition chamber for the thermal decomposition of ammonia
- 1928-Aug-21
Close-up view of a decomposition chamber used to facilitate the thermal decomposition of ammonia on tungsten, molybdenum, nickel, and iron catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research…
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Apparatus for studying the activity of potassium ions and electrons
- 1928-Aug-21
General view of an apparatus used to study the relative activity of potassium ions and electrons in the synthesis of ammonia from nitrogen and hydrogen gas at the U.S. Department of Agriculture's Fixed Nitrogen Research…
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Apparatus for measuring vapor pressures
- 1928-Aug-21
General view of an apparatus 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 Washington, D.C. In the production of…
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Dr. Leatherman measuring traces of inert gas and air in nitrogen
- 1928-Aug-21
General view of Dr. Leatherman using an apparatus to measure traces of inert gas and air in nitrogen at the Fixed Nitrogen Research Laboratory's High-Pressure Laboratory.
The Fixed Nitrogen Research Laboratory…
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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…
