Robert J. Wendlandt

H. P. Graves

H. P. Graves worked in the United States Engineer District Office.

A.A. Janos

H. J. Mack

H. J. Mack worked for the Edenfield Electric Company.

Myrtle E. Karcher

Myrtle E. Karcher was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.