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Start Over You searched for: Date 1930 to 1939 Remove constraint Date: <span class="from" data-blrl-begin="1930">1930</span> to <span class="to" data-blrl-end="1939">1939</span>-
Apparatus for studying the absorption spectrum of ozone
- 1930-Jan-08
General view of an apparatus used to study the absorption spectrum of ozone in visible and photographic infra red. This apparatus was used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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Apparatus for studying the absorption spectrum of ozone
- 1930-Jan-08
Close-up view of an apparatus used to study the absorption spectrum of ozone in visible and photographic infra red. This apparatus was used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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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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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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Carbon dioxide drier, compressor, liquifier, and liquid storage
- 1930-Jan-08
General view of a carbon dioxide drier, compressor, liquifier, and liquid storage used at the Fixed Nitrogen Research Laboratory's Urea Plant. Urea is a water-soluble powder form of carbonic acid frequently used as a…
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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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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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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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Lime glass tube
- 1930-Jan-08
Close-up view of a lime glass tube, part of an apparatus used to investigate the thermionic emission from platinum films sputtered on glass at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory…
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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
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
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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Main laboratory at Dow Midland plant
- 1930-Mar
General view of employees at work in the main laboratory at the Dow Chemical Company facilities located in Midland, Michigan. Assorted laboratory glassware and apparatus are visible throughout the laboratory.
- Creator Of Work Dow Chemical Company
- Subject Employees, Scientific apparatus and instruments, Dow Chemical Company, Glassware, Laboratories
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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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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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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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2 items
Interior of Engine Room at the Fixed Nitrogen Research Laboratory
- 1932-Jan-19
Two views of the interior of the Engine Room at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory, with both full and partial views of the blowing engines for the experimental blast furnace.
The…
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Interior of Engine Room at the Fixed Nitrogen Research Laboratory
- 1932-Jan-19
General view of the Engine Room at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. showing assorted machinery and apparatus.
The Fixed Nitrogen Research Laboratory…
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3 items
Interior of Engine Room at the Fixed Nitrogen Research Laboratory
- 1932-Jan-19
Three views of the Engine Room at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. showing assorted machinery and apparatus.
The Fixed Nitrogen Research Laboratory…
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Type 650-A Impedance Bridge
- After 1933
Rectangular wooden case with sloped top; black instrument panel on top surface; instrument panel features six connection posts for the external generator, a galvanometer meter under glass, nine black plastic knobs, four…
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Anton H.R. Noreen at work at Dearborn laboratory facility
- Circa 1934
General view of employee Anton H.R. Noreen at work at the Dearborn Chemical Company's 35th Street laboratory and manufacturing facility, with view of the laboratory work bench, assorted glassware, and scientific…
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Cliffs Dow plant in Marquette, Michigan
- After 1934 – before 1970
General view of a section of the interior of the Cliffs Dow wood distillation plant located in Marquette, Michigan. Seeking a source of raw material for its new plastic, ethylcellulose, the Dow Chemical Company joined…
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Cliffs Dow plant in Marquette, Michigan
- After 1934 – before 1970
General view of a section of the interior of the Cliffs Dow wood distillation plant located in Marquette, Michigan. Seeking a source of raw material for its new plastic, ethylcellulose, the Dow Chemical Company joined…
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Employees conducting water analysis at Dearborn laboratory facility
- 1934
General view of several employees conducting water analysis tests at the Dearborn Chemical Company's 35th Street laboratory and manufacturing facility located in Chicago, Illinois. The three employees visible in the…
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Water analysis at Dearborn laboratory facility
- Circa 1934
General view of employee Al Slisg conducting a water analysis test at the Dearborn Chemical Company's 35th Street laboratory and manufacturing facility located in Chicago, Illinois. Founded in 1887, the Dearborn…