Copy of (1939) letter of Albert Einstein to Franklin D. Roosevelt, regarding work of Enrico Fermi and L. Szilard (toward setting up nuclear chain reaction); brochure regarding French exhibit at Atom Fair; letter of AEC chairman Glenn T. Seaborg regarding Annual Report to Congress; letters and articles regarding 20th anniversary celebrations of first chain pile (CP-l) speech by AEC commissioner Robert E. Wilson on "Policy Objectives and Government Organization," at Atomic Industrial Forum; International Atomic Energy Agency Bulletin Special Number; press kit issued by AEC and White House, including "Remarks of the President to a Group of Scientists Who Witnessed the Original Fermi Experiment ... "; reprint of AEC report of March 1955, "The First Pile" and "Background Material."

Correspondence regardig Enrico Award, by General Advisory Committee chairmen K. S. Pitzer and Warren C. Johnson; newspaper clipping regarding Cyclotron inventor Ernest Orlando Lawrence; AEC commissioner Robert E. Wilson, "The Work of the AEC" letter of Bernard M. Baruch; Werner Brandt (Physics Department, New York University), "Possible New Atomic Resonances"; photocopy of signatures of persons present at 1942 "CP-l" experiment; John Wheeler (Princeton University), "Fission Then and Now" (autographed photoreprint), from International Atomic Energy Agency Bulletin Special Number; program of University of Chicago activities in the Third National Conference on the Peaceful Uses of Space, "Space and the University of Chicago"; correspondence with University of Chicago president George W. Beadle and Enrico Fermi Institute director Rerbert L. Anderson, re: events planned, including Greenewalt's lecture on bird song; "Proposed Statement by Business Leaders in Support of a Nuclear Test Ban Treaty," soliciting Greenewalt's signature; letter of Vannever Bush regarding General Groves' book on Manhattan Project, with related items by DuPont personnel Bush, and article in DuPont employee magazine Better Living; Burnett Outter Jr., to AEC and to Greenewalt, re: development of nuclear energy by private industry; AEC commissioner Robert E. Wilson's testimony on private ownership of special nuclear materials (HR 4035 and S 1160), before Joint Congressional Committee on Atomic Energy; also Wilson's article, "Actual and Alleged AEC Objectives in the Nuclear Power Field."

DuPont Legal Department, "Safeguarding of Restricted Data"; Greenewalt recommending John Wheeler (Princeton) for Enrico Fermi award; article regarding death of Dr. Leo Szilard; AEC citation of DuPont Company's Hood Worthington; agenda for visit by AEC personnel; article by Dale F. Babcock (EIDPDNCO.), "The Discovery of Xenon-135 as a Reactor Poison (reprinted from Nuclear News); Secretary of the Interior Stewart L. Udall, inviting Greenewalt to 22nd anniversary celebration of chain reaction.

DuPont Legal Department revisions to regulations (DP), re: AEC matters; collection of fables for physicists, by DuPont Atomic Energy Division's C.W. Wende; Greenewalt to Dr. Herbert L. Anderson, acknowledging vol. 2 of Enrico Fermi's papers, and referring to Greenewalt's monograph on bird song.

Copy of address by Samuel K. Allison (to University of Chicago gathering), recounting early atomic research and construction project, with emphasis on differences in approach of corporate (DuPont) and academic (Chicago) personnel with Greenewalt's comments in letter to Herbert L. Anderson (which also describes Greenewalt's recent high-energy physics activities; letters of Anderson updating Greenewalt on other physics developments; copy of remarks by Dr. Glenn T. Seaborg, AEC chairman, at dedication of the Arthur Rolly Compton Laboratory of Physics, Washington University (St. Louis, Missouri); requests to Greenewalt for material on Compton and Enrico Fermi; items regarding 25th anniversary of first nuclear chain reaction.

DuPont Executive Committee, regarding government request for DuPont survey of chemical problems relating to manufacture of plutonium, and committee resolution to undertake the survey as a public service; also organization notice designating members of Explosives Department to serve as the Atomic Project Survey Committee.

AEC general manager Caroll L. Wilson, R.M. Evans (General Electric Co. at Hanford), AEC general manager Carleton Shugg, DuPont chief engineer Granville M. Read, Karl T. Compton (Research and Development Board of Defense Department), Lt. Edwin F. Black (Office of the Secretary of Defense), and AEC chairman David Lilienthal; also copies of five items: letter to Hon. James Forrestal from Dr. Vannevar Bush; "The Atom and the Businessman"; "High Policy and the Atomic Bomb," by Bradley Dewey; "Please Don't Frighten Us," by Robert E. Sherwood; and "Report to the U.S. Atomic Energy Commission by the Industrial Advisory Group."