Jacob I. Cokin

C. E. Mitchell

C. E. Mitchell worked for the Roane-Anderson Company.

W.G. Chmielewski

W. G. Chmielewski was a carpenter at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Lewis L. Welden

Frank Smith

Frank Smith worked in the shop at the Metallurgical Laboratory in Chicago during the Manhattan Project.