Robert M. Sprague

P. S. Titus

P. S. Titus worked for the Union Carbide & Carbon Corporation.

E. L. Hile

E. L. Hile worked for the Fercleve Corporation.

E. Quigley

Ellen Watts

Ellen Watts (1921-2008) was a technician in the Metal Production Group of the Chemistry Division at the Chicago Met Lab during the Manhattan Project.