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L. Testa, glassblower, at work at U.S. Department of Agriculture
- 1931
General view of a glassblower, identified as L. Testa, working in an unidentified U.S. Department of Agriculture facility. Per a 1931 list of technical workers in the Department of Agriculture, Testa worked as a…
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2 items
Aerial view of U.S. Department of Agriculture facilities
- Circa 1930
Two aerial views of facilities believed to be associated with the U.S. Department of Agriculture.
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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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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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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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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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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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Employee conducting X-ray studies of catalysts for nitrogen fixation
- 1930-May-28
General view of an unidentified employee operating an apparatus used to produce x-radiation in order to study nitrogen fixation catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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2 items
Construction of phosphoric acid furnace
- 1930-May-28
Two views of the construction of the phosphoric acid furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. This furnace was used to make phosphoric acid through…
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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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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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Travis P. Hignett with blowing engines for experimental blast furnace
- 1930-Mar-21
General view of Travis P. Hignett examining blowing engines for the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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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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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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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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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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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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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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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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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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Ultrasonic oscillator with soil suspension
- 1930-Jan-08
Close-up view of an ultrasonic oscillator with a soil suspension and view of the driving transformer and oil bath containing piezoelectric quartz crystal. This oscillator was used at the U.S. Department of Agriculture's…
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2 items
Thermostated agitating device
- 1930-Jan-08
Two views of a thermostated agitating device with an all-glass system used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The term "thermostated" refers to a…
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Thermostat used in steel corrosion tests
- 1930-Jan-08
Close-up view of the thermostat used to maintain ammonia bubbles at sixty-five degrees Celsius during steel corrosion tests at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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2 items
Thermocouple apparatus at the Fixed Nitrogen Research Laboratory
- 1930-Jan-08
Two views of a thermocouple apparatus and assorted components, including a micro-spot welder and soldiering pencil, at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. …