The memo discusses a study of Zeromatic pH meters and includes a handwritten table of data.

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

The foldering of this document suggests it was written by Edwin Arthur. As in a 1957 document, "beauty" was the first criteria to be evaluated.

The glass electrodes were used in Beckman pH meters and various other…

In his address to the American Ceramic Society, Edwin Arthur discussed the importance of pH--and, by extension, the measurement of pH with Beckman instruments--in the work of ceramists.

Arnold Beckman invented his…

This advertisement, reprinted from the American Chemical Society News Edition, may be the earliest advertisement for the DU model. The page is stamped Apr 25 1961 (though the date is crossed out) and the reprint note is…

A chemist with Standard Oil Company's Research Department, Steininger explored the possible creation of an instrument to analyze and record hydrogen sulfide concentrations in oil refineries, a safety measure otherwise…

The handwritten account, possibly written by James C. Sternberg, is missing early pages.

The Glucose Analyzer was developed by James Sternberg in 1969 and was one of several very successful medical testing and analysis…

The document describes the components, operating instructions, troubleshooting, and maintenance of a prototype device. Handwritten notes were added to pages 27 and 31.

The Glucose Analyzer was developed by James…

The photostat document lists the first hundred companies and institutions to use Beckman's quartz spectrophotometers; the original document was undated.

The first Beckman Instruments DU Spectrophotometer was developed…

The letter provides an outsider perspective on Beckman Instruments' competition for the DR spectrophotometer's market.

This letter from S. Feier of Buffalo Apparatus Corporation provides an outsider perspective on competition for Beckman Instruments' DR Spectrophotometer market, with specific mention of the Fisher Spectrocord.

This series of handwritten and -drawn notes relates to the development of the Beckman DU-X2 spectrophotometer. One of the pages appears to be missing.

The first Beckman Instruments DU Spectrophotometer was developed in…

The memorandum discusses a rival company's spectrophotometer, the Warren Spectracord. (Warren Electronics, Inc. would be acquired by Perkin-Elmer in 1956). The Beckman Instruments DR Spectrophotometer is framed as…

Multimeters are instruments capable of making multiple measurements, typically voltage, current, and resistance.

Multimeters are instruments capable of making multiple measurements, typically voltage, current, and resistance.

Multimeters are instruments capable of making multiple measurements, typically voltage, current, and resistance.

This may be a photograph of Dr. Arnold O. Beckman with Walt Donner, the manager of Beckman Instruments' Space Engineering Department in the 1960s.

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…

The background instrument panel may be the DPM-100 Liquid Scintillation System.

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on…

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…

Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…