TY - PCOMM DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: In Copyright - Rights-holder(s) Unlocatable or Unidentifiable TI - Letter from Arnold Beckman to I. H. Lyons ID - cc08hg00q AU - Beckman, Arnold O. DA - 1937/08/17/ YR - 1937 AV - Beckman Historical Collection, Box 14, Folder 9 VL - Beckman Historical Collection, Box 14, Folder 9 AN - Beckman Historical Collection, Box 14, Folder 9 UR - https://digital.sciencehistory.org/works/cc08hg00q AB - The letter discusses Beckman's scheduled meetings, marketing strategies for the pH meter, and interest in postal meters. 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. KW - Postal service--Metered mail KW - Hydrogen-ion concentration--Measurement--Instruments KW - Scientific apparatus and instruments KW - Hydrogen-ion concentration KW - Beckman Instruments, Inc. LA - English ER -