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.
|In Copyright - Rights-holder(s) Unlocatable or Unidentifiable
Schiff, Raymond I. “Memo from Raymond I. Schiff to J. E. Leonard,” December 29, 1956. Beckman Historical Collection, Box 18, Folder 23. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/8336h239t.
This citation is automatically generated and may contain errors.
Download selected image
Previous image shift + or , Next image shift + or . Pan image Zoom in + or shift + Zoom out - or shift + Zoom to fit 0 Close viewer esc Also
Mouse click to zoom in; shift-click to zoom out. Drag to pan. Pinch to zoom on touch.