Search Results
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Apparatus for studying the absorption spectrum of ozone
- 1930-Jan-08
Close-up view of an apparatus used to study the absorption spectrum of ozone in visible and photographic infra red. This apparatus was used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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Apparatus for studying the absorption spectrum of ozone
- 1930-Jan-08
General view of an apparatus used to study the absorption spectrum of ozone in visible and photographic infra red. This apparatus was used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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Apparatus for studying the activation of gases
- 1930-Jan-08
Close-up view of an apparatus used to study the activation of gases by bombardment with positive ions at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed…
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Investigation of thermionic emission of positive ions
- 1930-Jan-08
General view of an apparatus used to investigate the thermionic emission of positive ions from platinum films sputtered on glass at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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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 decomposition of ammonia
- Circa 1927-Jul-26
R.A. Nelson (left) and E.S. Lamar (right) demonstrating an apparatus used to study the decomposition of ammonia on hot catalyst surfaces by means of the coated strip method. This apparatus was used at the U.S.…
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Apparatus for studying the decomposition of ammonia
- Circa 1927-Jul-26
Close-up view of an apparatus used to study the decomposition of ammonia on hot catalyst surfaces by means of the coated strip method. This apparatus was used at the U.S. Department of Agriculture's Fixed Nitrogen…
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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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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 used to analyze the decomposition of ammonia
- 1927-Jul-26
General view of the construction and calibration of an apparatus used to analyze the decomposition of ammonia on hot surfaces at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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Gas purification rack
- 1930-Jan-08
General view of the gas purification rack, a component of an apparatus used to study the catalytic decomposition of ozone at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington,…
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Apparatus for studying the catalytic decomposition of ozone
- 1930-Jan-08
General view of an apparatus used to study the catalytic decomposition of ozone 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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Bone and Wheeler gas analysis apparatus
- 1930-Jan-08
General view of the Bone and Wheeler gas analysis apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. A Bone and Wheeler apparatus, which reads gas…
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Apparatus for investigating the Phase Rule of an iron-nitrogen system
- 1930-Jan-08
General view of an apparatus used to investigate the Phase Rule in an iron-nitrogen system at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. First proposed by Josiah…
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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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Apparatus for determining the solubility of gases in water
- 1930-Jan-08
General view of an apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory to determine the solubility of gases in water at various temperatures and pressures up to 1,000 atmospheres.
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Apparatus for the analysis of micro quantities of gases
- 1930-Jan-08
General view of an apparatus used to analyze micro quantities of gases 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 the study of equilibrium
- 1930-Jan-08
General view of an apparatus for the study of equilibrium in the iron-water-iron oxide-hydrogen system at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed…
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Organic combustion furnace and train
- 1930-Jan-08
General view of the organic combustion furnace and train utilized 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.)…