Search Results
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Plate 6: Meusnier’s observations of the hydrogen balloon, August 27, 1783 (fig. 1)
- 1783
Jean Baptiste Marie Meusnier (1754-1793), an officer in the French Royal Corps of Engineers and a mathematician, observed the flight of the hydrogen-filled balloon launched from the Champs de Mars in Paris on August 27,…
- Author Faujas-de-St.-Fond, cit. (Barthélemy), 1741-1819
- Publisher Cuchet
- Subject Airships, Ballooning, Hot air balloons
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Letter from James C. Sternberg to Dr. Juan Ramirez-Munoz
- 1965-Jul-02
Letter regarding a Technical Roundtable hosted by Beckman Instruments to foster dialogue and innovation within the chemical analysis field in California in the 1960s.
- Addressee Ramirez-Munoz, Juan
- Author Sternberg, James C.
- Subject Hispanic American scientists, Beckman Instruments, Inc., California, Scientists
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Memo from James C. Sternberg to T. E. Kristofferson
- 1965-Aug-06
Dr. Sternberg does not believe that Perkin-Elmer, Inc. can patent a flame ionization detector, as their instrument would be too similar to the one described in this German patent. The Perkin-Elmer instrument would be in…
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Memo from R. Little and J. Sternberg to Wilbur Kaye
- 1965-Sep-21
This internal Beckman Instruments memo documents some of the difficulties of developing a portable glucose monitor. Items under consideration include a digital read out, whole blood versus dialysis or protein…
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Memo from James C. Sternberg to R. J. Steinmeyer
- 1967-Jan-26
This internal Beckman Instruments memo was written just as the first five research prototypes for the new Glucose Analyzer were being sent to external laboratories for evaluation. Dr. Sternberg questions the Beckman…
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Letter from Glenn Joseph to Arnold O. Beckman
- Circa 1933
Glenn Joseph writes to Dr. Beckman about the process of finding the right buffer to use in the new glass electrodes inside the pH meter. The identify of the "Dr. Dupont" referenced in this letter is uncertain.
Arnold…
- Addressee Beckman, Arnold O.
- Author Joseph, Glenn
- Subject Electrodes, Hydrogen-ion concentration--Measurement--Instruments, Sunkist Growers, inc., Scientific apparatus and instruments, Hydrochloric acid, Electrodes, Glass, Scientific apparatus and instruments--Design and construction, California Fruit Growers Exchange, Beckman Instruments, Inc.
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Job schedule for National Technical Laboratories
- 1934-Jan-09
This job schedule is a snapshot of the work being done by NTL in January, 1934. This work included the important pH meter development for the California Fruit Growers Exchange, of course, but also a project for Lee de…
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Description of Beckman Glucose Analyzer
- 1969-Jun-16
Description of the Beckman Glucose Analyzer written by Dr. James Sternberg. This draft was sent to another Beckman Instruments' employee for feedback, with the ultimate intention of using it in a magazine article and…
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Letter from Glenn Joseph to Arnold O. Beckman
- 1933
In this letter, Glenn Joseph reports that the vacuum-tube amplifier in the early Beckman pH meter model is (still) not functioning properly. One of the fixes he proposes is replacing the vacuum tubes with a glass…
- Addressee Beckman, Arnold O.
- Author Joseph, Glenn
- Subject Electrodes, Hydrogen-ion concentration--Measurement--Instruments, Sunkist Growers, inc., Scientific apparatus and instruments, Electrodes, Glass, Scientific apparatus and instruments--Design and construction, Amplifiers, Vacuum-tube, California Fruit Growers Exchange, Beckman Instruments, Inc.
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Letter from W. E. Baier to Arnold O. Beckman
- 1934-Jun-22
This letter spells out the instrument maintenance and upgrades that the California Fruit Growers Exchange believe are included with the cost of developing the "glass electrode apparatus" (an early prototype of the…
- Addressee Beckman, Arnold O.
- Author Baier, W. E.
- Subject Hydrogen-ion concentration--Measurement--Instruments, Sunkist Growers, inc., Scientific apparatus and instruments, Electrodes, Glass, Scientific apparatus and instruments--Design and construction, California Fruit Growers Exchange, Beckman Instruments, Inc.
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Financial statement for McLeod Gauge and glass electrode development
- 1934-Apr-10
Invoice from Arnold O. Beckman to W. E. Baier
for developing and calibrating McLeod gauges and glass electrodes -- components involved in the early Beckman pH meter.Arnold Beckman invented his first pH meter in 1934…
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Financial statement for glass electrode
- 1934-Jun-19
A bill sent by Arnold Beckman to W. E. Baier, covering the cost of a "glass-electrode apparatus," which was included in the first Beckman pH meter.
Arnold Beckman invented his first pH meter in 1934 at the request of a…
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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.