The letter regards the development of Models K and L oxygen meters, recommendations for which are ready for further testing by the National Defense Research Committee, and a note that some are unsuitable due to…
In this letter, Evans discusses a new electrode design for use in Beckman 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…
In this letter, Beckman discusses acidimeter production, personnel issues, patent applications, and the naming of the instrument.
Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH…
Linus Pauling's oxygen meter was developed as a military project and the details were classified. In this letter, Pauling requested permission to discuss the oxygen meter at a Caltech seminar. He also states a desire to…
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…
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…
Memo regarding Pauling Oxygen Meter submarine model, which was developed by Arnold Beckman during World War II. The British Navy has put in orders for the instrument, and here Pauling inquires as to why the United…
Letter from Jan W. Haagen-Smit (son of smog research pioneer Arie Haagen-Smit) about his work developing and testing a new oxygen electrode for Arnold O. Beckman, Inc.
In this memo, Jan Haagen-Smit includes a labeled photograph of the testing set-up for the Beckman oxygen electrode, which includes Beckman Oxygen Analyzers. The memo (but not the photograph) in this digitized image is a…