Search Results
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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 exterior 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 exterior 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…
-
Cliffs Dow plant in Marquette, Michigan
- After 1934 – before 1970
General view of a section of the exterior 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…
-
Cliffs Dow plant in Marquette, Michigan
- After 1934 – before 1970
General view of a section of the exterior 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…
-
Cliffs Dow plant in Marquette, Michigan
- After 1934 – before 1970
General view of a section of the exterior 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…
-
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…
-
Cliffs Dow plant in Marquette, Michigan
- After 1934 – before 1970
General view of a section of the exterior 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…
-
Cliffs Dow plant in Marquette, Michigan
- After 1934 – before 1970
General view of a section of the exterior 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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Beckman Model E2 oxygen analyzer
- 1960s
Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers ended up doing such diverse jobs as monitoring astronauts’ respiration, maintaining packaged food safety,…
- Photographer Hesketh, Dean D.
- Subject Scientific apparatus and instruments, Oxygen--Measurement, Oxygen--Analysis, Beckman Instruments, Inc.
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Beckman Model C2 Oxygen Analyzer
- 1960 – 1979
Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers ended up doing such diverse jobs as monitoring astronauts’ respiration, maintaining packaged food safety,…
- Photographer Armstrong & Hess
- Subject Scientific apparatus and instruments, Oxygen--Measurement, Oxygen--Analysis, Beckman Instruments, Inc.
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Beckman Research pH meter with Micro Blood pH Assembly and Thermomatic
- 1950 – 1969
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an accurate way to measure the acidity of his product. The resulting instrument kicked off…
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Beckman Research pH meter dial, close up
- 1950 – 1969
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an accurate way to measure the acidity of his product. The resulting instrument kicked off…
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Beckman Research pH meter, interior view
- 1960s
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an accurate way to measure the acidity of his product. The resulting instrument kicked off…
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Man with Beckman Research pH meter, H2 electrode, and Thermomatic
- 1960s
The edge of the paper used as a photo backdrop can be seen, taped to the bench on which the instruments sit.
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus…
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Beckman H2 Electrode Cell Assembly mounted in Thermomatic Constant Temperature Block
- 1960s
The Thermomatic was used in cases where sample temperature was important, such as in the measurement of blood pH.
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Various models of Beckman pH meters
- 1960s
This group photograph appears to include Models G, N, N2, 72, and Pocket pH meters.
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an…
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Beckman Type 945 Lead Terminator
- 1968
This instrument was designed to be incorporated into electroencephalograph units and included an impedance meter. An electroencephalogram test detects electrical impulses in the brain via electrodes attached to the…
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Beckman DSA 560E Discrete Sample Analyzer
- Circa 1968
The DSA-560 Discrete Sample Analyzer, introduced in 1968, was Beckman's first clinical chemistry analyzer. It was capable of processing 100 samples per hour and used in the analysis of blood serum, urine, and drinking…
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Low resistance glass electrode #78074V
- 1960s
- Photographer Hesketh, Dean D.
- Subject Electrodes, Glass, Beckman Instruments, Inc.
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Calomel reference electrode, side fill, #78026V
- 1960s
- Photographer Hesketh, Dean D.
- Subject Electrodes, Beckman Instruments, Inc.
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Long reservoir reference electrode #78090V
- 1950 – 1969
- Photographer Dietrich, T. A.
- Subject Electrodes, Beckman Instruments, Inc.
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Beckman carbon frit reference electrode #78019V
- 1960s
- Photographer Hesketh, Dean D.
- Subject Electrodes, Carbon, Beckman Instruments, Inc.
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Beckman reference electrode #92301
- 1950 – 1969
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an accurate way to measure the acidity of his product. The resulting instrument kicked off…
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Beckman Custom Electrode
- 1960s
This electrode was designed for use with a pH meter.
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an accurate way to measure the acidity…