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…

The diagram is annotated in red and blue ink, indicating first and second position.

Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an…

This letter regards the use of oxygen meters on submarines and in hospitals, issues of cost and portability, and the Naval Research Laboratory's interest in detecting other gases.

Developed from a Linus Pauling design…

Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH meter in 1934 and thus began a long career manufacturing scientific and medical instruments with National Technical Laboratories,…

The letter sketches the specifications for a partial pressure indicator for use in aircraft, and notes that a prototype has already been constructed. The recipient may be a member of the Navy's Research and Development…

The DR Spectrophotometer was a basic model DU (an ultraviolet, single beam, quartz-crystal spectrophotometer) with an added recorder. This one-sheet description of the instrument was used in several Beckman Instruments…

Letter regarding the possible development of an aviation model of the Pauling Oxygen Meter for the Bureau of Aeronautics.

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

Letter regarding various requirements for the Pauling Oxygen Meter, including the possibility of making a combination moisture detector and oxygen meter. At the time, both Reuben Wood and Dr. Spencer S. Prentiss were…

The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

This letter to Dr. Spencer S. Prentiss of the National Defense Research Committee describes the results of the clinical trial of the Pauling Oxygen Meter by the United States Army. The Army decided not to standardize…

The letter discusses the various parties interested in testing Pauling oxygen meters and the possibility of meeting in Washington or Philadelphia.

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

In this letter Pauling reiterates requests for permission to discuss and publish on the oxygen meter, and argues for loosening security classification. He cites Arnold O. Beckman's permission to discuss the project…

In this letter, Churchill confirms that the National Defense Research Committee (NDRC) has granted Beckman permission to discuss the Pauling Oxygen Meter at an American Chemical Society meeting.

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…

Prentiss responds to Kauffman's assessment of the hospital oxygen analyzer, with emphasis upon the question of its ruggedness.

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

In this letter, Beckman discusses the testing and production of various models of the Pauling oxygen meter. Model F is discussed in the most detail, but Models P, G, and a damaged aircraft Model L are also mentioned.
…

Summarizing a report of the Army Medical Center's trial of the Pauling oxygen meter, Julius Kauffman noted that the device was accurate but "rather fragile."

Developed from a Linus Pauling design during WWII, the…

A Nearnst glower is a now-obsolete device that uses a cylindrical rod of heated oxides to deliver infrared radiation in instruments used for spectroscopy.

The Beckman Instruments IR spectrophotometers began as a…

Letter regarding the extension of the military contract for Beckman Instruments' Pauling Oxygen Meter development. This letter also mentions the possibility of using the instrument inside oxygen tents.

Developed from a…

In this letter, Prentiss shares his initial impressions of a prototype aircraft oxygen meter.

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

The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

In this letter, Dr. Prentiss inquires about the possibility of combining a moisture detector and an oxygen meter, presumably for use in submarines. At the time, Dr. Spencer S. Prentiss was working for the National…

The letter regards the procurement of Pauling meters for use on submarines and issues of cost and portability.

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

Arnold Beckman informs J. H. Rushton that the Model G oxygen meter is ready for testing, but the Model F is not. An order has been received from the Linde Company, but not fulfilled, and an experimental instrument was…

The letter discusses testing of the Pauling hospital oxygen meter and concerns about its ruggedness--specifically, its ability to survive being dropped onto a stone floor from a height of three feet.

Developed from a…