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Department Archives Remove constraint Department: Archives Genre Manuscripts Remove constraint Genre: Manuscripts Language English Remove constraint Language: English Subject Beckman Instruments, inc. Remove constraint Subject: Beckman Instruments, inc. Subject Electrodes, Glass Remove constraint Subject: Electrodes, Glass

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    • 1956

    Although the author is unknown, these instructions were most likely written by a Beckman Instruments employee. This glass electrode was used in Beckman pH meters.

    Arnold Beckman invented his first pH meter in 1934 at…

    • 1954-Sep-26

    These handwritten notes on glass electrodes appear to be signed Noel B. Brayman.

    Glass electrodes were used in Beckman pH meters and various other instruments.

    • 1955-May-10

    The handwritten notes appear to be signed Noel Brayman.

    Glass electrodes were used in Beckman pH meters and various other instruments.

    • Final draft
    • 1955-Feb-25

    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…