Close-up view of employee George R. Carr seated in his office at the Dearborn Chemical Company's 35th Street laboratory facility and manufacturing plant. Founded in 1887, the Dearborn Chemical Company was a corporate ancestor of BetzDearborn, Incorporated best known for manufacturing water treatment chemicals for use in boilers and cooling towers.
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Dearborn Chemical Company. “George R. Carr at Dearborn Chemical Company Office,” 1927–1928. BetzDearborn, Incorporated Records, Box 17, Folder 16. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/qr46r182z.
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