General view of male and female employees at work in an office space at the Dearborn Chemical Company 35th Street laboratory facilities located in Chicago, Illinois. While the majority of the employees are unidentified, the two female employees seated at the desk closest to the camera (right-hand side) are identified as Eva Vaughn (left) and Ella Cantlon (right).

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.