Search Results
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Letter from Arnold O. Beckman to Glenn Joseph
- 1934-Apr-09
Directions for calibrating a McLeod gauge for use with the early model of the Beckman pH meter. This letter is likely related to the handwritten McLeod gauge diagrams and calculations also found in this folder. At the…
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Letter from Arnold O. Beckman to L. H. Duschak
- 1935-Apr-30
Response to an earlier letter from Dr. Duschak, asking if Dr. Beckman's new "acidimeter" would be appropriate for determining the pH of vegetable juices. Beckman describes some of the recent changes to the instrument,…
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Letter from L. H. Duschak to Arnold O. Beckman
- 1935-Apr-26
One of the earliest inquiries into using one of Arnold Beckman's newly invented pH meters.
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed…
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Letter from Arnold O. Beckman to Glenn Joseph
- 1934-Jun-25
Letter regarding the possible contents of and functioning of the glass electrode in the first pH meter models.
Arnold Beckman invented his first pH meter in 1934 at the request of Glenn Joseph, a chemist from the…
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Calibration of a McLeod Gauge
- 1930s
The McLeod Gauge measures very low pressures of gasses. Its presence in this collection indicates that it was used during the production of Beckman Instruments' early pH meters. These calibrations may have been written…
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Letter from L. H. Duschak to Arnold O. Beckman
- 1935-May-03
Duschak comments on the price of the pH meter (high, but in line with comparable instruments) and inquires whether or not the "acidimeter" could be sold again after his project is finished.
Arnold Beckman invented his…
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McLeod gauge calibration calculations
- 1934-Mar-22
These calibrations and the diagram were done by W. E. Baier, Research Manager of the California Fruit Growers' Exchange. The McLeod Gauge measures very low pressures of gasses. Its presence in this collection indicates…
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Letter from Arnold O. Beckman to Dr. L. H. Duschak
- 1936-May-13
In this letter, Beckman confirms that Duschak can indeed use one of the new "acidimeters" and return it to National Technical Laboratories afterwards. This letter also reveals that during the initial production of the…
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Beckman Model D Oxygen Meter in use with an infant's incubator
- 1950s
Los Angeles County General Hospital nurse Mary Finlay is monitoring the oxygen levels of a prematurely born infant in an incubator, to provide just the right oxygen mixture. Too little oxygen has obvious repercussions,…
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Beckman Model D Oxygen Meter in use with an infant's incubator
- Circa 1959
This nurse is monitoring the oxygen levels of a prematurely born infant in an incubator, to provide just the right oxygen mixture. Too little oxygen has obvious repercussions, but until the 1950s doctors did not realize…
- Photographer Kassler Studios
- Subject Hospitals, Oxygen--Measurement, Newborn infants--Medical care, Infants, Women in medicine, Beckman Instruments, Inc.
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Beckman D2 Oxygen Meter in use with an infant's incubator
- 1950s
This nurse is monitoring the oxygen levels of a prematurely born infant in an incubator, to provide just the right oxygen mixture. Too little oxygen has obvious repercussions, but until the 1950s doctors did not realize…
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Beckman D-2 Oxygen Meter in use in a hospital nursery
- Circa 1960
Los Angeles County General Hospital nurse Mary Finlay is monitoring the oxygen levels of a prematurely born infant in an incubator, to provide just the right oxygen mixture. Too little oxygen has obvious repercussions,…
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Naval Air Engineering Center at Mustin Field
- Circa 1962
Aerial view of the Naval Air Engineering Center located at Mustin Field in Philadelphia, Pennsylvania, showing the assorted laboratory and manufacturing facilities.
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Electrical Evaluation, Polymeric Materials
- 1958
View of two technicians using assorted apparatus to evaluate the electrical resistivity of high polymers at the Naval Air Material Center's Aeronautical Materials Laboratory. At the laboratory, assorted equipment was…
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Establishment of constant humidity condition for the evaluation of experimental humidity indicators
- 1958
View of a technician at the Naval Air Material Center's Aeronautical Materials Laboratory using an unidentified apparatus to create a constant humidity condition in order to evaluate experimental humidity indicators. At…
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Endurance testing of aircraft hydraulic pump
- 1958
General view of machinery used to conduct endurance tests of high-temperature (400 degrees Fahrenheit), high-pressure (3000psi) aircraft hydraulic pump at the Naval Air Material Center's Aeronautical Materials…
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General view of the Plastics Testing area
- 1958
General view of the Plastics Testing area at the Naval Air Material Center's Aeronautical Materials Laboratory. Technicians are seen working with assorted equipment used to simulate various service conditions and test…
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Building 537, Hangar and Laboratory facilities
- Circa 1950
Exterior view of building 537 at the Naval Air Material Center's Aeronautical Materials Laboratory, housing an aircraft hangar and laboratory facilities.
- Creator Of Work Naval Air Material Center, United States. Navy
- Subject Aerospace Research Laboratories (U.S.), Naval Research Laboratory (U.S.)
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Metallographic examination of metals and alloys
- 1955
View of a technician performing a metallographic examination of metals and alloys in the Naval Air Materials Center's Aeronautical Materials Laboratory. Metallography is the study of the physical structure and…
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Tensile testing of new aircraft alloys
- 1955
General view of technicians conducting tensile tests on new aircraft alloys at the Naval Air Material Center's Aeronautical Materials Laboratory. In tensile, or tension, testing, tensile machines are used to subject…
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RCA Model EMU electron microscope in the Aeronautical Materials Laboratory
- 1958
General view of a RCA Model EMU electron microscope used in the Naval Air Material Center's Aeronautical Materials Laboratory. Electron microscopes use a beam of accelerated electrons as a source of illumination and…
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Spectrographic analysis
- 1958
General view of assorted equipment and apparatus used to conduct spectographic analysis at the Naval Air Material Center's Aeronautical Materials Laboratory.
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Engineers calendering experimental stocks of rubber
- Circa 1949
View of two engineers, Stanley Bilker (background) and Ralph Harper (foreground), operating the calender sheeting machine at the the Naval Air Experimental Station's Rubber Compounding and Processing Laboratory. The…
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Testing electrical resistivity of high polymers at the Naval Air Material Center
- 1958
View of two technicians using assorted apparatus to determine the electrical resistivity of high polymers at the Naval Air Material Center's Aeronautical Materials Laboratory. At the laboratory, assorted equipment was…
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Ultra-Violet and Visible Spectrum Spectrophotometer
- Circa 1958
General view of the Ultraviolet and Visible Spectrum (UV/Vis) Spectrophotometer used in the Naval Air Material Center's Aeronautical Materials Laboratory. UV/Vis spectroscopy is routinely used in analytical chemistry…