Search Results
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Portrait of Thomas Midgley, Jr. (1889-1944)
- 1930s – circa
Portrait of Thomas Midgley, Jr. (1889-1944), an American engineer and chemist who discovered the effectiveness of tetraethyl lead as an antiknock additive for gasoline.
Thomas Midgley, Jr. was born on May 18, 1889 in…
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Portrait of George O. Curme, Jr. (1888-1976)
- 1930s – circa
Portrait of George O. Curme, Jr. (1888-1976), popularly known as the father of ethylene and for his pioneering work on applications for by-products of petroleum processing.
Born in Mount Vernon, Iowa on December 24,…
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2 items
Demonstration of cold-drawing technique for polyester
- Circa 1930
Two close-up views of a demonstration of the cold-drawing technique used to produce the 3-16 polyester super-silk fiber, the forerunner of nylon. This technique was discovered by DuPont chemist Julian Hill (1904-1996)…
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Apparatus for studying the structure of molecules
- 1930-Jan-08
General view of an apparatus used to study the structure of molecules by means of the Raman effect using a three-glass prism Steinheil Spectrograph. This apparatus was used at the U.S. Department of Agriculture's Fixed…
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2 items
Pumps and coolers at Urea Plant
- 1930-Jan-08
Two views of the liquid ammonia and carbon dioxide pumps and coolers at the Fixed Nitrogen Research Laboratory's Urea Plant. In the production of fertilizer, liquid carbon dioxide and liquid ammonia are commonly…
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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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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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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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Employee at work in raw material storage at Fixed Nitrogen Research Laboratory plant
- 1930s
General view of an unidentified worker sorting raw material, possibly ore or phosphate, at a Fixed Nitrogen Research Laboratory plant. The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at American…
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Apparatus at Fixed Nitrogen Research Laboratory
- 1930s
General view of an unidentified apparatus, possibly a pump or compressor, used 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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2 items
Parts of an apparatus used to grow higher plants in a sterile medium
- 1930-Jan-08
Two views of the component parts of an apparatus used to grow higher plants in a sterile medium at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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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. …
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Apparatus for studying the mechanism of nitrogen fixation
- 1930-Jan-08
General view of an apparatus used for the spectroscopic study of the mechanism of nitrogen fixation in the electric arc at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington,…
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2 items
Dr. Kuentzel studying the thermal and catalytic decomposition of azomethane
- 1930-Jan-08
Two views of Dr. Kuentzel studying the thermal and catalytic decomposition of azomethane at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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Postcard and French postage stamp commemorating Louis Pasteur
- After 1885 – before 1953
Postcard image is a reproduction of Finnish painter Albert Edelfelt's famed portrait "Pasteur Dans Son Laboratoire" [Pasteur In His Laboratory]. The portrait depicts Pasteur in his laboratory at the rue d'Ulm,…
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Assembly of apparatus for sterile plant cultures
- 1930-Jan-08
Close-up view of the assembly of an apparatus used for sterile cultures of taller green plants at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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Sterile culture of small phanerogams at the Fixed Nitrogen Research Laboratory
- 1930-Jan-08
Close-up view of a sterile culture of small phanerogams, also known as spermatophytes or seed plants, at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The…
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Alsike clover plant at the Fixed Nitrogen Research Laboratory
- 1930-Jan-08
Close-up view of an alsike clover plant at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Notably, the root of the plant is growing from the pedicel (i.e. the stem…
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Dr. Burk and Mr. Lineweaver with microapparatus for studying bacterial nitrogen fixation
- 1930-Jan-08
General view of the microapparatus and assorted laboratory equipment used to study bacterial nitrogen fixation at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.…
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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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Assorted apparatus in the Steel Corrosion Laboratory
- 1930-Jan-08
General view of assorted apparatus used in the Steel Corrosion Laboratory at the U.S. Department of Agriculture's Fixed Nitrogen Research facility located in Washington, D.C. Apparatus include a constant volume…
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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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Hydraulic pump at the Fixed Nitrogen Research Laboratory
- 1930-Jan-08
General view of the hydraulic pump used to perform steel corrosion tests 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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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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Driving mechanism for infrared spectrograph
- 1930-Jan-08
Close-up view of the driving mechanism of an automatic self-recording infrared spectrograph used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Features of note…
