Reports; correspondence; historical papers; interviews; diaries; clippings. Primarily reports from the German nuclear power (nuclear weapons and nuclear energy) project during World War II. These records were captured in 1944-1945 by the scientific intelligence-gathering ALSOS Mission headed by Samuel Goudsmit, and made available to the Manhattan Engineer District. Correspondence is mostly between German scientists on applied nuclear fission, pile experiments, etc. Historical papers and interviews are mostly of German scientists in the 1950s and 1960s, as well as with some Allied personnel connected with the ALSOS Mission. Diaries and diary extracts are those of Otto Hahn, Erich Bagge, and Karl-Otto Saur. Clippings (1950s-1960s) are from German, English, and American newspapers. Topics include nuclear reactor experiments of various types, heavy water production, isotope separation, and the British commando raid on the Vemork plant. Correspondents include Walther Wilhelm Bothe, Otto Hahn, Paul Harteck, and Werner Heisenberg. Reel 3 (DJ 29) includes Papers on discovery of nuclear fission, Prof. Erich Bagge, Heisenberg, Harteck, Gerlach, Reichsforschungsrat. Reel 4 (DJ 30) contains the complete set of fourteen Geheime Forschungsberichte, January 1942-October 1944 (some early frames illegible). Reels 5 (DJ 31A) and 6 (DJ 31B) include loose Forschungsberichte, 1940-45; interview notes; miscellaneous German and Allied papers (English), documents, some A.D.I.(K) reports, etc.