General view of employee A. Sherwood using an extraction rack at the Dearborn Chemical Company's 35th Street Laboratory facility and manufacturing plant. Per notations accompanying the photograph, the extraction rack is being used as part of the saponification (conversion) process commonly employed to convert oils into soap and alcohol.
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. “A. Sherwood Using Extraction Rack at Dearborn Laboratory Facility,” circa 1924. BetzDearborn, Incorporated Records, Box 17, Folder 13. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/x920fx81s.
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