P.P. Springer

S. L. Leatherman

J. G. Reynolds

Reynolds worked for Stone and Webster Engineering Corporation.

Clyde R. Emery

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

J. V. O’Connor

J. V. O’Connor worked for the Union Carbide & Carbon Corporation.