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 instruments.
“Test Specification for Glass Electrodes,” February 25, 1955. Beckman Historical Collection, Box 17, Folder 21. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/rv042t46z.
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