Search Results
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2 items
No. 2 experimental blast furnace
- 1932-Jan-19
Two views of the No. 2 experimental blast furnace at a U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory plant. The individuals visible in the first photograph are identified (left to right) as Reilly;…
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3 items
Tapping slag from experimental blast furnace
- 1930-Mar-21
Three views of Mr. Royster (left) and Travis Hignett (right) tapping slag from the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Mr.…
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2 items
Letter from Robert S. Mulliken to Harrison Shull, 1961
- 1961
Robert Mulliken (1896-1986) writes to Harrison Shull (1923-2003) regarding an upcoming visit by Shull. Mulliken informs Shull that he will have some physicists visiting for the occasion, and requests Shull ask Clemens…
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5 items
Experimental blast furnace at the Fixed Nitrogen Research Laboratory
- 1930-Mar-21
Assorted views of slag being tapped from the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The individuals visible in the photographs…
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Fertilizer trays at U.S. Department of Agriculture facility
- 1950s – circa
General view of fertilizer trays on a suspension apparatus at an unidentified U.S. Department of Agriculture facility.
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U.S. Department of Agriculture drillability apparatus
- 1950s – circa
General view of a drillability apparatus with fertilizer hoppers, a starwheel, and rotating plate mechanism at an unidentified U.S. Department of Agriculture facility.
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Radioactive material handling at U.S. Department of Agriculture facility
- 1950s – circa
General view of a chemist handling radioactive material at an unidentified U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing, including the…
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Stokes Tablet Press at Agricultural Engineering Laboratory
- 1950s
General view of a Stokes Tablet Press at the U.S. Department of Agriculture's Agricultural Engineering Laboratory facility. A tablet press is a mechanical device that compresses granulated material into tablets or…
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Granulation equipment at the Agricultural Engineering Laboratory
- Circa 1953
General view of granulation equipment used at the U.S. Department of Agriculture's Agricultural Engineering Laboratory located in Beltsville, Maryland. This equipment is believed to have been used by chemist John O.…
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Small-scale continuous granulation equipment
- Circa 1953
General view of small-scale continuous granulation equipment used at the U.S. Department of Agriculture's Agricultural Engineering Laboratory.
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Drillability apparatus at the Agricultural Engineering Laboratory
- Circa 1953
General view of an unidentified room at the U.S. Department of Agriculture's Agricultural Engineering Laboratory showing a drillability apparatus with fertilizer hoppers, a starwheel, and rotating plate mechanism.
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Fertilizer trays at the Agricultural Engineering Laboratory
- 1953-Jul-15
General view of the trays used to expose fertilizer to humidity in the Air Control Room at the U.S. Department of Agriculture's Agricultural Engineering Laboratory.
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Drillability machine and hopper at the Agricultural Engineering Laboratory
- 1955-Jan-25
General view of the drillability machine at the U.S. Department of Agriculture's Agricultural Engineering Laboratory showing the distribution of wet granular fertilizer as deposited by the Grether hopper.
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Warburg-Barcroft microrespiration apparatus
- 1930-Jan-08
Close-up view of the Warburg-Barcroft microrespiration apparatus used to study bacterial nitrogen fixation at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The…
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Apparatus for studying photoelectric emissivity
- 1930-Jan-08
Close-up view of an apparatus used to study the photoelectric emissivity of catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Emissivity is a measure of the…
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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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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
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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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 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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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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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…