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Genre Pamphlets Remove constraint Genre: Pamphlets Place California--South Pasadena Remove constraint Place: California--South Pasadena Format Image Remove constraint Format: Image Date 1950 Remove constraint Date: <span class='single'>1950</span>

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    • Bulletin 170
    • circa 1950

    Promotional, color pamphlet for the Model H pH Meter.

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

    • Beckman Reprint R-38
    • 1950-Jun

    Beckman Instruments reprinted and distributed this paper, originally published in Analytical Chemistry Vol. 22, No. 6, June 1950.