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 - Memo from Raymond I. Schiff to J. E. Leonard ID - 8336h239t AU - Schiff, Raymond I. DA - 1956/12/29/ YR - 1956 AV - Beckman Historical Collection, Box 18, Folder 23 VL - Beckman Historical Collection, Box 18, Folder 23 AN - Beckman Historical Collection, Box 18, Folder 23 UR - https://digital.sciencehistory.org/works/8336h239t AB - Raymond Schiff describes the dangers of Zeromatic users receiving electric shocks. 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 - Hydrogen-ion concentration--Measurement--Instruments KW - Scientific apparatus and instruments KW - Hydrogen-ion concentration KW - Beckman Instruments, Inc. LA - English ER -