Search Results
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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 investigating the Phase Rule of an iron-nitrogen system
- 1930-Jan-08
General view of an apparatus used to investigate the Phase Rule in an iron-nitrogen system at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. First proposed by Josiah…
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Apparatus for determining the solubility of gases in water
- 1930-Jan-08
General view of an apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory to determine the solubility of gases in water at various temperatures and pressures up to 1,000 atmospheres.
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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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Organic combustion furnace and train
- 1930-Jan-08
General view of the organic combustion furnace and train utilized at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen Research Laboratory (F.N.R.L.)…
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Mounted French postage and semipostal stamps depicting Louis Pasteur
- 1922 – 1936
Nine small postage stamps in various denominations issued in commemoration of the 100th anniversary of the birth of Louis Pasteur in 1922. The large semipostal stamp was issued in 1936 and includes a surtax for the…
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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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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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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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Combination hot plate and shaker
- 1930-Jan-08
View of a combination hot plate and shaker used to investigate potash at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Potash salts are an important component in the…
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Absorption chamber for nitrogen oxides
- 1930-Jan-08
Absorption chamber for nitrogen oxides used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. In this photograph, the chamber's casing has been removed to show the…
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Apparatus for the analysis of vapors at the Fixed Nitrogen Research Laboratory
- 1930-Jan-08
Apparatus used to analyze vapors 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, D.C. In the…
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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…
