Albert B. Lawrence

Mary M. Fair

Mary Fair worked as a lab assistant at the Metallurgical Lab at the University of Chicago. She was not sure of the purpose of her work, but often used radiation detecting devices in the experiments.

James S. Gray

W. R. Studhalter

W. R. Studhalter worked for the United States Engineer District Office.

Helen Addison

Helen Addison worked for the Roane-Anderson Company.