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Genre Manuscripts Remove constraint Genre: Manuscripts Subject Beckman Instruments, inc. Remove constraint Subject: Beckman Instruments, inc. Subject Electrodes, Glass Remove constraint Subject: Electrodes, Glass Subject Hydrogen-ion concentration--Measurement--Instruments Remove constraint Subject: Hydrogen-ion concentration--Measurement--Instruments

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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.