Search Results
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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…
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Dr. D.C. Bardwell studying the mechanism of nitrogen fixation by alpha rays
- 1926-Apr
General view of Dr. D.C. Bardwell inspecting the apparatus used for the fixation of nitrogen by alpha rays at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The…
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E.H. Johnston studying ozone production at the Fixed Nitrogen Research Laboratory
- 1926-Apr
General view of Mr. E.H. Johnston demonstrating an apparatus used for the production of ozone at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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R.J. Connor photographing the spectrum of active nitrogen
- 1926-Apr
General view of R.J. Connor photographing the spectrum of active nitrogen at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. In chemistry, "spectrum" commonly refers…
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J.F. Shultz investigating the effect of phosphine upon ammonia catalysts
- 1926-Apr
General view of J.F. Shultz demonstrating an apparatus used to analyze the effect of phosphine upon ammonia catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington,…
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Dr. E. C. White with apparatus for the automatic analysis and indication of the carbon monoxide content of a gas stream
- 1926-Apr
General view of Dr. E. C. White demonstrating use of an apparatus for the automatic analysis and indication of the carbon monoxide content of a gas stream at the U.S. Department of Agriculture's Fixed Nitrogen Research…
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Dr. M.F. Fogler with apparatus for dissociation of nitric acid
- 1926-Apr
General view of Dr. M.F. Fogler demonstrating an apparatus used for the dissociation of nitric acid at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed…
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Dr. Sebastian Karrer measuring the thermal conductivity of active nitrogen
- 1926-Apr
General view of Dr. Sebastian Karrer using an apparatus to measure the thermal conductivity of active nitrogen at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The…
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High-temperature vacuum furnace
- Circa 1926
High-temperature vacuum furnace used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American University in 1919 under…
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Electric arc furnace for making ferro-aluminum alloys
- Circa 1926
Electric arc furnace used to make ferro-aluminum alloys at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American…
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Exhibit concerning the fixation of atmospheric nitrogen
- Circa 1926
Exhibition display concerning the fixation of atmospheric nitrogen at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The display includes several diagrams depicting…
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Rotary filter for extracting cyanamide from calcium cyanamide
- Circa 1926
Rotary filter used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory to extract cyanamide from calcium cyanamide.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American…
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Apparatus for studying the separation of ammonia from carbon dioxide
- Circa 1926
Apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory to study the separation of ammonia from carbon dioxide.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at…
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Chemical warfare research laboratory at American University
- Circa 1917
Exterior view of a chemical warfare research laboratory under construction at American University near Washington, D.C. American research concerning chemical warfare was initially organized under the Bureau of Mines,…
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Large-capacity constant temperature bath
- 1930-May-28
General view of a large-capacity constant temperature bath with a removable glass front used 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 determining solubility of gases in liquids
- 1930-May-28
General view of an apparatus used to determine the solubility of gases in liquids at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Visible in the bath of the…
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Model of a synthetic ammonia plant
- Circa 1928
General view of a table-top model of a synthetic ammonia plant showing an assortment of plant machinery and apparatus. The model was created by the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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E.J. Fox with towers used for absorption of nitric oxides
- 1928-Aug-21
General view of E.J. Fox demonstrating use of towers to facilitate the absorption of nitric oxides by phosphate rock at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.…
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E.J. Fox operating rotary tunnel for absorption of nitric oxides
- 1928-Aug-21
General view of E.J. Fox demonstrating use of a rotary tunnel to facilitate the absorption of nitric oxides by ground phosphate rock at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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Thermostat and apparatus for measuring vapor pressures
- 1928-Aug-21
General view of the thermostat and apparatusused 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. Urea is a…
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Thermostat, apparatus, and analytical train
- 1928-Aug-21
General view of the thermostat, apparatus, and analytical train 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…
