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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 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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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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2 items
Apparatus for oxidizing ammonia
- 1926-Apr
Two views of an apparatus used to oxidize ammonia with pure oxygen using bed catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The individual visible in the…
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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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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 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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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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Fixed Nitrogen Research Laboratory personnel
- 1925-Nov-06
Group photograph of Fixed Nitrogen Research Laboratory personnel posed outside an unidentified facility. The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American University in 1919 under the…
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2 items
Exterior view of the Fixed Nitrogen Research Laboratory
- 1920
Two views of the exterior of the Fixed Nitrogen Research Laboratory facilities located at American University near Washington, D.C. The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American…
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Portrait of Milton Whitney (1860-1927)
- 1910s
Portrait of Milton Whitney (1860-1927), Chief of the Division of Agricultural Soil (later alternately known as the Division of Soils and/or Bureau of Soils), a partner in the National Cooperative Soil Survey (NCSS).…
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Portrait of James Wilson (1835-1920)
- 1910s
Portrait of James Wilson (1835-1920), who served as Secretary of Agriculture from 1897 to 1913. Wilson's tenure as Secretary is regarded as a period distinguished by the modernization of agricultural methods, as well as…
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Milton Whitney (Chief of Bureau of Soils)
- 1910s
Photograph of Milton Whitney (1860-1927), Chief of the Bureau of Soils, posed with a map of the United States and assorted scientific apparatus. Whitney served as the first Chief of the Division of Agricultural Soil,…
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James Wilson (Secretary of Agriculture 1897-1913)
- 1910s
Photograph of James Wilson, Secretary of Agriculture from 1897 to 1913, seated in a horse-drawn carriage with an unidentified African American driver. Wilson's tenure as Secretary is regarded as a period distinguished…
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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,…