TY - MANSCPT DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: In Copyright, D TI - Water sample testing at Mary's Help Hospital ID - dn39x2299 AU - Dearborn Chemical Company DA - 1936/08/18/ YR - 1936 AV - BetzDearborn, Incorporated Records, Box 15, Folder 64 VL - BetzDearborn, Incorporated Records, Box 15, Folder 64 AN - BetzDearborn, Incorporated Records, Box 15, Folder 64 UR - https://digital.sciencehistory.org/works/dn39x2299 AB - General view of Dearborn Chemical Company representative C.M. Kesler (seated) and hospital employee "Mike" examining a sample of water at Mary's Help Hospital (now Seton Medical Center) in San Francisco, California. Per notations accompanying the photograph, the water was treated with Dearborn compounds and subsequently analyzed for hardness. 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. KW - Mary's Help Hospital (Daly City, Calif.) KW - Employees KW - Chemical industry KW - Dearborn Chemical Company KW - Water purification chemicals industry KW - Corporations KW - Scientific apparatus and instruments KW - Water--Testing KW - Water--Analysis LA - ER -