Search Results
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General repair shop at the Fixed Nitrogen Research Laboratory
- Circa 1928
General view of the general repair shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facilities located in Washington, D.C.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was…
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Flushing slag from phosphoric acid furnace
- 1930-May-28
Close-up view of molten slag emerging from the phosphoric acid furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The slag consists of waste produced during…
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Machine shop at the Fixed Nitrogen Research Laboratory
- Circa 1928
General view of the machine shop at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facilities located in Washington, D.C.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at…
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Travis P. Hignett measuring combustion temperature in blast furnace
- 1930-May-28
Close-up view of Travis P. Hignett using an optical pyrometer to measure the combustion temperature of coke in the blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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Travis P. Hignett and Mr. Royster with hot blast stove
- 1930-May-28
General view of the hot blast stove, a component of the phosphoric acid furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The individuals visible in the…
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Cyanamide Laboratory
- Circa 1928
General view of the Cyanamide Laboratory at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facilities located in Washington, D.C. Assorted glassware and laboratory apparatus, including a…
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E.J. Fox and K.S. Love at work in Nitrogen Analytical Laboratory
- 1928 – circa
General view of E.J. Fox and K.S. Love at work in the Nitrogen Analytical Laboratory at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facilities located in Washington, D.C. Assorted glassware…
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Phosphoric acid furnace at Fixed Nitrogen Research Laboratory
- 1930-May-28
General view of a phosphoric acid furnace in use at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Phosphorus fumes and molten slag are seen emerging from the furnace…
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Ore-crushing machinery at blast furnace plant
- 1930-Mar-21
General view of machinery used to crush ore at the Fixed Nitrogen Research Laboratory's blast furnace plant. A worker identified as "Parker" is seen transferring raw material, presumably ore, from a machine into a…
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Phosphoric acid furnace at Fixed Nitrogen Research Laboratory
- 1930-May-28
General view of a phosphoric acid furnace in use at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Phosphorus fumes are seen emerging from the furnace as part of the…
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Travis P. Hignett and Mr. Royster reading temperature inside experimental blast furnace
- 1930-Mar-21
General view of Travis P. Hignett (left) and Mr. Royster (right) reading the temperature inside the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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Control panel for experimental blast furnace
- 1930-Mar-21
General view of the control panel for the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The individual visible in the photograph is…
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Travis P. Hignett with experimental blast furnace at Fixed Nitrogen Research Laboratory
- 1930-Mar-21
General view of Travis P. Hignett demonstrating use of the blowing engines for the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. A…
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Mr. Madorsky with gas-fired smelting furnace
- 1930-Mar-21
General view of the gas-fired smelting furnace used to volatilize (i.e. cause to evaporate or disperse in vapor) potash at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington,…
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Storage piles for experimental blast furnace
- 1930-Mar-21
General view of storage piles of raw material, including greensand, leucite, coke, and limestone, used in the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located…
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Experimental furnace for smelting of phosphate rock
- 1927-Jul-26
General view of an experimental furnace used to smelt phosphate rock 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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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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Samples from Ammonia-(Urea-Water) system
- 1927-Jul-26
General view of numbered test tube samples from the Ammonia-(Urea-Water) system at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Urea is a water-soluble powder form…
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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…
