Search Results
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Mounted French postage and semipostal stamps depicting Louis Pasteur
- 1922 – 1936
Nine small postage stamps in various denominations issued in commemoration of the 100th anniversary of the birth of Louis Pasteur in 1922. The large semipostal stamp was issued in 1936 and includes a surtax for the…
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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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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 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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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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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 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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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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Letter from Arnold O. Beckman to Claire Evans
- 1935-Aug-30
Beckman thanks Evans for his hospitality during a trip to Denver, Colorado to sell the new pH meter and hopes that Evans will become a distributor for the instrument. Beckman's stops in Denver included Coors Porcelain…
- Addressee Evans, Clare
- Author Beckman, Arnold O.
- Subject Great Western Sugar Company, Hydrogen-ion concentration--Measurement--Instruments, Scientific apparatus and instruments, Colorado--Denver, Coors Porcelain Company, Central Scientific Company, Beckman Instruments, inc., California Institute of Technology, Scientific apparatus and instruments--Marketing
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Letter from I. H. Lyons to Arnold O. Beckman
- 1935-Aug-23
Lyons writes to Beckman during Beckman's travels around the United States to market his new "acidimeter." This letter in particular mentions the orders rolling in following the first advertisement for the pH meter and…
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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 Arnold O. Beckman to J. J. Murdock
- 1935-Aug-30
This letter from Arnold Beckman was sent during his 1935 trip around the United States to promote and secure distributors for his new pH meter (or "acidimeter") in 1935. Beckman reports on the enthusiasm of both…
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Letter from J. J. Murdock to Arnold O. Beckman
- 1935-Oct-18
Murdock references receipt of correspondence and a blood sample from Noyes, expresses pleasure at Millikan's interest in his work, and discusses real estate matters, including the erection of apartment buildings.
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Letter from Arnold O. Beckman to J. J. Murdock
- 1935-Oct-14
The letter touches on Arthur Noyes's medical condition and discusses problems with an instrument demonstration caused by residue in electrodes. Beckman was a friend and colleague of Dr. Noyes and was seeking medical…
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Letter from Arnold O. Beckman to Dr. T. J. Glover
- 1935-Nov-03
Beckman discusses cancer treatment options for his friend and colleague, Dr. Amos A. Noyes, and offers to provide Glover with a pH meter.
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Letter from W. O. Anderson to Arnold O. Beckman
- 1935-Sep-07
Anderson writes from National Technical Labatories to Arnold Beckman, providing him with an update about "acidimeter" production and pre-sales interest while Beckman is away in New York City. He notes that the first…
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Letter from I. H. Lyons to Arnold O. Beckman
- 1935-Jun-03
Letter to Arnold O. Beckman about the early stages of planning marketing and distribution for the pH meter. The National Postal Meter Company on the letterhead was one of Arnold Beckman's first employers, when they…
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Letter from T. J. Glover to Arnold O. Beckman
- 1935-Nov-11
The letter regards Arthur Noyes's test results and serum supplied for his treatment.
- Addressee Beckman, Arnold O.
- Author Glover, T. J.
- Subject Blood--Analysis, Noyes, Arthur A. (Arthur Amos), 1866-1936, Cancer--Treatment
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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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5 itemsA Discussion of pH Measurement Methods
- 1936-Aug
This report outlines the colorimetric and electrical ways to determine the pH of a solution and the various kinds of electrodes that can be used with electrical instruments. Beckman concludes that a method using glass…
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Letter from Clare Evans to Arnold O. Beckman
- 1937-Aug-19
Evans writes to Beckman while he is on a trip to New York City about advertising and production of the new pH meter, especially the Model M.
Arnold Beckman invented his first pH meter in 1934 at the request of a…
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Letter from I. H. Lyons to Arnold O. Beckman
- 1937-Sep-02
Lyons thinks the new system of distribution for the Beckman pH meter will be an important change for the "industrial field." The National Postal Meter Company on the letterhead was one of Arnold Beckman's first…
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Unequalled for Precise Research and Analytical Work
- 1940s
This advertisement for the Model G pH meter highlights the different electrodes that could be used with it. The Model G was Beckman Instruments's first commercial pH meter.
Arnold Beckman invented his first pH meter in…
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2 itemsSterimatic: Introduction to Sales Manual and Service Digest
- 1940-Dec-04
The document and an accompanying manual were intended to prepare sales staff to answer customer questions and perform other job functions. The Sterimatic was a device which automatically dispensed a pH-controlled…
- Creator Of Work Beckman Instruments, inc.
- Subject Sterilization, Selling, Employees--Training of, Beckman Instruments, inc., Materials--Marketing