Some photographs include more specific dates or notes, including an image's use in the 1973 annual report.
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.
Edwards Studio, and Curtis Studios. “Portraits of Arnold O. Beckman (1900-2004),” 1970–1979. Beckman Historical Collection, Box 56, Folder 70. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/8k71nh540.