Patrick J. Gahan

Josef Novak

Josef Novak worked in the shop at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

F. W. Schremp, Jr.

F. W. Schremp, Jr. worked for the United States Engineer District Office.

Harry J. Stephens

Helen J. Arson

Helen J. Arson was a laboratory technician in the Health Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.