Search Results
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2 items
U.S. Department of Agriculture exhibition display
- Circa 1926
Two views of the U.S. Department of Agriculture's exhibition display at the Chemical Industries Exposition in New York. Highlighting the work of the Fixed Nitrogen Research Laboratory, the display includes panels on…
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2 items
Fixed Nitrogen Research Laboratory exhibition display
- 1926
Two views of an exhibition display concerning the work of the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The display includes assorted sample jars and a photograph…
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2 items
Assorted Urea Plant apparatus
- 1926-Apr
Two views of assorted apparatus at the Fixed Nitrogen Research Laboratory's Urea Plant. Urea is a water-soluble powder form of carbonic acid frequently used as a fertilizer and feed supplement. The individuals present…
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4 items
Apparatus for measuring the compressibility of gases
- 1926-Apr
Four assorted views 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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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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Potentiometer at Fixed Nitrogen Research Laboratory
- Circa 1926
General view of a Brown Potentiometer and other assorted apparatus and machinery used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Potentiometers are used to…
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Study of the decomposition of ammonia on catalyst surfaces
- 1926-Apr
R.A. Nelson (left) and Dr. C.H. Kunsman (right) demonstrating an apparatus used to study the decomposition of ammonia on catalyst surfaces at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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Apparatus for measuring thermionic properties
- 1926-Apr
General view of an apparatus used to measure the thermionic properties of catalyst surfaces at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. In chemistry, the term…
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Apparatus for testing water gas catalysts
- 1926-Apr
J.F. Shultz demonstrating use of an apparatus to test water gas catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The term "water gas" commonly refers to…
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Removal of carbon dioxide from water gas
- 1926-Apr
M.C. Molstad demonstrating use of an apparatus for the removal of carbon dioxide from water gas by means of scrubbing under pressure at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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Apparatus for the emission of positive ions
- 1926-Apr
General view of an apparatus used for the emission of positive ions at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The individuals present in the photograph are…
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Apparatus for measuring the effect of radiation
- 1926-Apr
General view of an apparatus used to measure the effect of radiation on chemical reactions at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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Dr. D.C. Bardwell using an apparatus for experimenting with radon
- 1926-Apr
General view of Dr. D.C. Bardwell using an apparatus to experiment with the chemical effects of radon at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed…
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2 items
Dr. C.H. Kunsman with positive ion emitting device
- 1926-Apr
Two views of device used to study positive ions, presumably in the activation of nitrogen gas and hydrogen, at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The…
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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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Apparatus for removal of carbon monoxide from water gas
- 1926-Apr
W.E. Kuentzel demonstrating use of an apparatus to remove carbon monoxide from water gas by means of scrubbing with a cuprous (i.e. copper) solution at the U.S. Department of Agriculture's Fixed Nitrogen Research…
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Mrs. M.K. Murray using nitrometer at the Fixed Nitrogen Research Laboratory
- 1926-Apr
General view of Mrs. M.K. Murray demonstrating use of a nitrometer, an apparatus used to determine the amount of nitrogen or nitrogen compounds in a substance or mixture, at the U.S. Department of Agriculture's Fixed…
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Control panel for compressors in Urea Plant
- 1926-Apr
General view of the control panel for compressors at the Fixed Nitrogen Research Laboratory's Urea Plant. In the production of fertilizer, liquid carbon dioxide and liquid ammonia are commonly combined under…
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Apparatus for nitration of organic substances
- 1926-Apr
L.A. Pinck demonstrating an apparatus used for the nitration of organic substances at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen Research…
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Carbon dioxide regenerator in Urea Plant
- 1926-Apr
General view of the carbon dioxide regenerator at the Fixed Nitrogen Research Laboratory's Urea Plant. In the production of fertilizer, liquid carbon dioxide and liquid ammonia are commonly combined under high-pressure…
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Heat converter, interchanger, and condenser for water-gas hydrogen production
- 1926-Apr
General view of a heat converter, interchanger, and condenser used for water-gas hydrogen production at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The term "water…
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Water gas generator at the Fixed Nitrogen Research Laboratory
- 1926-Apr
General view of the exterior of the water gas generator at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The term "water gas" commonly refers to the mixture of…
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Exterior of Fixed Nitrogen Research Laboratory's Urea Plant
- 1926-Apr
General view of the exterior of the Fixed Nitrogen Research Laboratory's Urea Plant, showing assorted apparatus and equipment used to produce Urea, a water-soluble powder form of carbonic acid frequently used as a…
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V.L. Gaddy operating compressors at Urea Plant
- 1926-Apr
General view of V.L. Gaddy demonstrating use of compressors at the Fixed Nitrogen Research Laboratory's Urea Plant. In the production of fertilizer, liquid carbon dioxide and liquid ammonia are commonly combined under…
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Dr. J.G. Thompson and Mr. C.L. Sullivan operating hydrogen burner
- 1926-Apr
General view of Dr. J.G. Thompson (left) and Mr. C.L. Sullivan (right) operating a hydrogen burner during the production of the hydrogen-nitrogen mixture used in the synthesis of ammonia at the U.S. Department of…
