Intentionally blank pages (28, 40, and 42) have been omitted from the digital work.
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 acidity of his product. The resulting instrument kicked off rapid development not only of Beckman Instruments, Inc. but also of the electronic scientific instrument industry.
|Creator of work|
|Place of creation|
|Original file type||TIFF|
|Rights||No Copyright - United States|
|View in library catalog|
Wheeler, A. Edward. “Instruction Manual, Zeromatic PH Meter,” July 1957. Beckman Historical Collection, Box 105, Folder 73. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/ms35t945j.
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