Close-up view of the bucking board and crusher used to prepare coal and ore samples for analysis at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois. 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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Dearborn Chemical Company. “Bucking Board and Crusher at Dearborn Laboratory.” Album of Early Dearborn Chemical Company Facilities, 1890s-1905, circa 1905. BetzDearborn, Incorporated Records, Box 18, Volume 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/fb494935f.
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