R. E. Petersen

Harvey Matthioson

Harvey Matthioson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

R. J. McLeod

R. J. McLeod worked for the United States Engineer District Office.

Nelson P. Taylor

William S. Hartnett

Bill Hartnett worked in plutonium metallurgy for the Manhattan Project at the Hanford Engineer Works from January 1943 to December 1946.