National Museum of Nuclear Science & History
S. W. Barnes worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Mortimer Schwartz served in the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
J. M. Ryan worked for the United States Engineer District Office.
Helen R. Hughes was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
