General view of a storage tank in use at the Dearborn Chemical Company's 35th Street laboratory facility and manufacturing plant. The employee visible in the photograph is unidentified. 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. “Storage Tank at Dearborn Manufacturing Facility,” circa 1934. BetzDearborn, Incorporated Records, Box 17, Folder 14. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/c534fp99m.
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