Skip to Content
You searched for
Search
Creator Beckman, Arnold O. Remove constraint Creator: Beckman, Arnold O. Rights In Copyright Remove constraint Rights: In Copyright

Search Constraints

Search Results

    • 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…

    • 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…

    • 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…

    • 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…

    • 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…

    • 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,…

    • 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.

    • 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.

    • 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…

    • 1935-Nov-11

    The letter regards Arthur Noyes's test results and serum supplied for his treatment.

    • 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…

    • 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…

    • 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…

    • 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…

    • 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…

    • 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…

    • 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…

    • 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…

    • 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…

    • 1941-Nov

    The article is reprinted from the Journal of the Optical Society of America Vol. 31, No. 11, November 1941 and was presented at the Ninth Summer Conference on Spectroscopy and Its Applications, held at the Massachusetts…

    • 1944-Mar-07

    A letter from Arnold O. Beckman to Fred T. Williams, a patent advisor at the National Defense Research Committee. In this letter, Beckman reports on the delay in filing a patent for his carbon monoxide detecting…

    • 1945-Nov-12

    Arnold Beckman discusses the status of contract reports, an instrument damaged during shipment, and asks about Spencer Prentiss's post-war plans. He expects to consult with Linus Pauling to decide which instrument to…

    • 1945-Sep-20

    Arnold Beckman notes that he has been busy after the "termination of the war" and discusses bugs in the Model E and complaints about the ruggedness of the oxygen meter.

    Developed from a Linus Pauling design during…

    • 1945-Jul-02

    In this letter, Beckman describes the specifications of the aircraft model oxygen meter (the Model L).

    Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers…

    • 1945-Jul-02

    Arnold Beckman expresses concern that the secrecy of the oxygen meter project could adversely affect sales in the anticipated post-war markets.

    Developed from a Linus Pauling design during WWII, the technology behind…