Close-up view of a balance in use at the Dearborn Chemical Company's 35th Street laboratory facility and manufacturing plant. The employee visible in the photograph is identified as Irin Crocker. 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. “Balance in Use at Dearborn Chemical Company,” March 16, 1934. BetzDearborn, Incorporated Records, Box 17, Folder 14. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/3x816n64f.
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