Close-up view of company president Robert F. Carr, Sr. 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. “Robert F. Carr at Dearborn Chemical Company Office,” 1927–1928. BetzDearborn, Incorporated Records, Box 17, Folder 16. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/g445cf195.
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