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Department Archives Remove constraint Department: Archives Genre Business correspondence Remove constraint Genre: Business correspondence Place New York (State)--New York Remove constraint Place: New York (State)--New York Subject Scientific apparatus and instruments Remove constraint Subject: Scientific apparatus and instruments

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    • 1935-Jun-03

    Letter to Arnold O. Beckman about the early stages of planning marketing and distribution for the pH meter. The National Postal Meter Company on the letterhead was one of Arnold Beckman's first employers, when they…