Exhibitions
Page Dr. J. R. Dunning circulated this internal "restricted"
letter just months prior to the bombing of Hiroshima. It was distributed
to an engineering department (called S.A.M. Laboratories and located
at Columbia University) that was working on the Manhattan Project.
The letter thanks members for their outstanding work and dedication
to the project. This copy belonged to Mildred Goldberg, a secretary,
who unknowingly typed out scientific formulas for this top secret
wartime operation and later collected the documents contained in this
exhibition.
