Jean Johnson at work in a laboratory while sitting at table with various equipment. Her back is mostly turned to the camera.
Two unidentified white female nurses working in laboratory. One is seated in front of a microscope and the other is standing at a table, adjusting...
Doris Clark Graddy demonstrating lab techniques to visitors from Standard Oil Company (white men) who are standing behind her as she looks into a...
Two unidentified female lab technicians (one white, one African American) working in a hospital testing lab. The white woman at the left is seen from...
Two unidentified women at separate tables in a corner of a laboratory. One working with bottles and petri dishes. Furthest woman has her back to the...
