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At the Institute’s core is the Gilder Lehrman Collection, one of the great archives in American history. More than 85,000 items cover five hundred years of American history, from Columbus’s 1493 letter describing the New World through the end of the twentieth century.

Dunning, John R. (John Ray) (1907-) [To staff members of Columbia University, S.A.M. Laboratories, Division 1]

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Gilder Lehrman Collection #: GLC03152.07 Author/Creator: Dunning, John R. (John Ray) (1907-) Place Written: New York, New York Type: Typed letter Date: 31 January 1945 Pagination: 1 p. ; 27.8 x 21.6 cm. Order a Copy

Dunning, a physicist working on the Manhattan Project, tenders his resignation as Director of Division I (at the Nash building, where Columbia University's Substitute or Special Alloy Metals Laboratory was located). Writes, "The work to which we are all giving our best efforts has progressed a great distance since the early days of 1939 and 1940. The loyal cooperation, the brilliant ideas and the sound practical realism which have been welded together in this work have been virtually unparalleled. A miracle of development and production has been wrought." Marked "restricted" with a red stamp at the top of the page. Also at the top of the page, "Mrs M Goldberg" is written in pencil.

Mildred Goldberg worked as a secretary at S.A.M.

Dunning, John Ray, 1907-
Goldberg, Mildred, 1923-2008

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