Jack L. Callan

LaborerChicago, IL

Manhattan Project VeteranProject Worker/Staff

Jack L. Callan was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Related Profiles

C. R. Frazier

C. R. Frazier worked for the Poe Piping & Heating Company.

E. E. Coulter

Charles Helmers

Charles Helmers worked for the J.A. Jones Construction Company.

Norman Johnson