O.C. Schroeder

H. C. Smith

H. C. Smith worked for the United States Engineer District Office.

J. B. Chaney

Walter Groeger

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

I. T. Lockwood

I. T. Lockwood worked for the Tennessee Eastman Corporation at the Y-12 Plant.