The photographs document birthday celebrations.
Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH meter in 1934 and thus began a long career manufacturing scientific and medical instruments with National Technical Laboratories, Arnold O. Beckman, Inc., and Beckman Instruments. After his retirement he devoted his life to philanthropy and specifically supporting scientific innovation.
“Arnold Beckman's 100th Birthday,” April 2000. Beckman Historical Collection, Box 56, Folder 51. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/bg257f402.
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