TY - MANSCPT DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: In Copyright, D TI - A.R. Sherwood calibrating hydrometer at Dearborn laboratory facility ID - k643b236b AU - Dearborn Chemical Company DA - 1934/03/16/ YR - 1934 AV - BetzDearborn, Incorporated Records, Box 17, Folder 14 VL - BetzDearborn, Incorporated Records, Box 17, Folder 14 AN - BetzDearborn, Incorporated Records, Box 17, Folder 14 UR - https://digital.sciencehistory.org/works/k643b236b AB - 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. KW - Employees KW - Chemical industry KW - Laboratories KW - Water purification chemicals industry KW - Corporations KW - Hydrometer KW - Dearborn Chemical Company KW - Scientific apparatus and instruments KW - Sherwood, A.R. LA - ER -