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A.R. Sherwood calibrating hydrometer at Dearborn laboratory facility

  • 1934-Mar-16

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Close-up view of employee A.R. Sherwood calibrating a concentration hydrometer 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, cooling towers, and steam locomotives.

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  • 7.75 in. H x 9.75 in. W
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  • Deaborn Chemical Company
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  • Courtesy of Science History Institute

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  • Box 17, Folder 14

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Dearborn Chemical Company. “A.R. Sherwood Calibrating Hydrometer at Dearborn Laboratory Facility,” March 16, 1934. BetzDearborn, Incorporated Records, Box 17, Folder 14. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/k643b236b.

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