General view of employees at work in the Analytical Laboratory at the Dearborn Chemical Company's 35th Street laboratory facility located in Chicago, Illinois. The employees visible in the photograph are identified as follows (left to right): Ruth Johnson Dugo; Lillian Kazmierzki; Valentine I. Miciulis; and Serge Levicki. 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. “Analytical Laboratory at Dearborn Chemical Company Facility,” 1955. BetzDearborn, Incorporated Records, Box 15, Folder 39. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/t148fj16v.
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