Search Results
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Investigation of thermionic emission of positive ions
- 1930-Jan-08
… Fixed Nitrogen Research Laboratory located in Washington, D.C. In chemistry, the term "thermionic" is commonly used to describe a substance or…
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Measurement of gas volumes at Fixed Nitrogen Research Laboratory
- 1928-Aug-21
…Nitrogen Research Laboratory facilities located in Washington, D.C. In chemistry, compressibility refers to the measure of how much a given volume…
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4 items
Apparatus for measuring the compressibility of gases
- 1926-Apr
… Fixed Nitrogen Research Laboratory located in Washington, D.C. In chemistry, compressibility refers to the measure of how much a given volume…
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Oral history interview with Nancy Carrasco
- 1990-Mar-07
…universal literature, and history, geography, all the way to biology and chemistry and mathematics. It’s three years, and by the third year you have … wanted to go to medical school, I was concentrated in biology and chemistry. THACKRAY: Was it medical school rather than an …where you get to study that as such. I considered going to biology or chemistry, but then in biology you study a lot of taxonomy of plants and animals…
- Interviewee Carrasco, Nancy, 1957-
- Interviewer Thackray, Arnold, 1939-, Sawyer, Richard
- Sponsor Pew Charitable Trusts
- Subject Carrasco, Nancy, 1957-, Women in chemistry, Biochemistry, Women biochemists, Molecular cloning, Albert Einstein College of Medicine, Eukaryotic cells, Thyroid gland, Iodides, Sodium ions
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Technician with Fixed Nitrogen Research Laboratory apparatus
- 1920s
General view of an unidentified analytical apparatus and technician 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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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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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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2 items
Apparatus used to oxidize ammonia
- Circa 1928
Two views of an apparatus used to oxidize ammonia 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.) was established…
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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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3 items
Carbon monoxide generator and compressor
- 1928-Aug-21
Three views of the carbon monoxide generator and compressor used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The individual visible in the second and third…
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Kiln in use at U.S. Department of Agriculture facility
- 1950s – circa
View of chemist George Wieczorek removing a vessel from a Pereco kiln 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
George Wieczorek (right) and two unidentified chemists handling radioactive material at an U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing,…
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International Fertilizer Distributor machine
- 1944-Jul-14
General view of an International Fertilizer Distributor (No. 49 Machine) in use at the U.S. Department of Agriculture's Plant Industry Station facility in Beltsville, Maryland. This machine was used to determine the…
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Potentiometer at Fixed Nitrogen Research Laboratory
- Circa 1926
General view of a Brown Potentiometer and other assorted apparatus and machinery used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Potentiometers are used to…
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Front lateral view of infrared spectrograph
- 1930-Jan-08
Front lateral view of an infrared spectrograph used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Visible components of the spectrograph include the thermocouple…
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Study of the decomposition of ammonia on catalyst surfaces
- 1926-Apr
R.A. Nelson (left) and Dr. C.H. Kunsman (right) demonstrating an apparatus used to study the decomposition of ammonia on catalyst surfaces at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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Apparatus for testing water gas catalysts
- 1926-Apr
J.F. Shultz demonstrating use of an apparatus to test water gas catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The term "water gas" commonly refers to…
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Apparatus for studying the activity of potassium ions and electrons
- 1928-Aug-21
General view of an apparatus used to study the relative activity of potassium ions and electrons in the synthesis of ammonia from nitrogen and hydrogen gas at the U.S. Department of Agriculture's Fixed Nitrogen Research…
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Apparatus used to analyze the decomposition of ammonia
- 1927-Jul-26
General view of the construction and calibration of an apparatus used to analyze the decomposition of ammonia on hot surfaces at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
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Compressor used in carbon dioxide refrigeration system
- 1928-Aug-21
General view of compressor used in the carbon dioxide refrigeration system at the Fixed Nitrogen Research Laboratory's High-Pressure Laboratory. The individual present in the photograph is identified as Mr. Tremearne.
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Hydraulic pressure pump and other laboratory apparatus
- 1928-Aug-21
General view of assorted apparatus used in the Fixed Nitrogen Research Laboratory's High-Pressure Laboratory, including a hydraulic pressure pump, piston-type gauges, high-pressure booth, and valve manifold. The…
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Apparatus for removal of carbon monoxide from water gas
- 1926-Apr
W.E. Kuentzel demonstrating use of an apparatus to remove carbon monoxide from water gas by means of scrubbing with a cuprous (i.e. copper) solution at the U.S. Department of Agriculture's Fixed Nitrogen Research…
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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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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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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…