Includes: Records of the Office of the Director, 1940-1947 (124 lin. ft.): Combined subject correspondence of NDRC Chairman and OSRD Director Vannevar Bush (1940-1947) and NDRC Chairman James Bryant Conant (1941-1946), 1940-1947. Subject-numeric central correspondence, including that of NDRC (1940-1941) 1940-1947. Correspondence of OSRD director concerning missions to England and a peacetime science program, 1941-1946. Monthly reports of actions taken on contracts, 1941-1946. Statistical reports on personnel, budgets, and projects, 1941-1945. Records of support units: Records of the Office of the Historian, consisting of subject files, 1943-1946; issuances of various OSRD units, 1943-1946; and an unpublished manuscript, entitled Radar in World War II, by Henry Guerlac, 1947. Case files of the Committee on OSRD Publications, 1944-1947. Records of Research Units in the Office of the Director, 1939-1950 (53 lin. ft.): Records of Section S-1 Executive Committee and its predecessors: Combined subject files of Vannevar Bush and James Bryant Conant, dealing with all aspects of early U.S. research on atomic bomb, including United States-United Kingdom collaboration, 1939-1947. Office files of various OSRD officials and scientists associated with the S-1 Section research program, 1940-1950. Copies of MED records, including resumes of scientific personnel engaged in atomic research; reports on research facilities; and a history of Canadian heavy water research (Project Evergreen Area), 1943-1947. Correspondence and reports relating to atomic research conducted by the Naval Research Laboratory, 1939-1945. Records of other units: Records of Section T, responsible for research on proximity fuses, consisting of subject correspondence and technical reports, 1942-1944. Correspondence of the Committee on Sensory Devises relating to the development of sensory devices for the blind and near-blind, 1944-1946; Records of the Administrative Office, 1940-1947 (929 lin. ft. and 487 rolls of microfilm): Records of the Administrative Division: Office files of OSRD Executive Secretary and Administative Division Head Cleveland Norcross, 1942-1946. Memorandums and manuals relating to administrative procedures, 1943-1946. Contractor's reports, with index, 1940-1947. Contract files, with index, 1940-1947 (257 ft.). OSRD headquarters and field office issuances, with index, 1941-1946. Records of the Project Control Section relating to assignments, 1941-1947. Copies of published histories, reports, and monographs of OSRD and component units, 1941-1947. Microfilm copy of contractors' technical reports, with index, 1941-1947 (487 rolls). Summary NDRC technical reports, with index, 1946-1947. Bimonthly and final project reports, 1940-1947. Records of the Legal Division. Subject correspondence, 1941-1947. Records of the Patent Division: Subject correspondence, 1941-1947. Correspondence concerning the patent clearance of contracts, 1941-1947. Invention disclosure files, with accompanying register, 1941-1947. Correspondence relating to the federal government's radar program, 1942-1944. Correspondence relating to inventions referred to the various NDRC and Committee on Medical Research units, 1941-1947. Copies of U.S. Patent Office disclosure forms, 1942-1946. Records of the National Defense Research Committee (NDRC), 1940-1947 (1,320 lin. ft.): General records: Minutes, 1940-1945. Reports on proposed projects, 1940-1945. Office files of various NDRC members, 1940-1947. Persons included: Roger C. Adams, Conway P. Coe; Karl T. Compton, Frank B. Jewett, Casper W. Ooms, Richard C. Tolman. Records of the Engineering and Transition Office and its predecessor: Records of headquarters, consisting of subject correspondence, 1942-1946; and correspondence with various NDRC divisions, 1942-1946. Field office records, consisting of subject files, 1944-1945, and correspondence with various NDRC divisions, 1944-1945. Records of divisions: Correspondence, project files, reports, and staff member office files of Division B, 1940-1943; and of Division 1 (Ballistic Research), 1941-1946; Division 2 (Impact and Explosion), 1941-1946; Division 3 (Special Projectiles an Rocket Ordnance), 1940-1946; Division 4 (Ordnance Accessories), 1940-1945; Division 5 (New Missiles), 1940-1946; Division 6 (Sub-Surface Warfare), 1941-1946; Division 7 (Fire Control), 1940-1946; Division 8 (Explosives), 1940-1945; Division 9 (Chemistry), 1940-1945; Division 10 (Absorbents and Aerosols), 1940-1945; Divison 11 (Chemical Engineering), 1940-1945; Division 12 (Transportation Development), 1940-1945; Division 13 (Electrical Communication), 1941-1946; Division 14 (Radar), 1941-1946; Division 15 (Radio Coordination), consisting of records of field offices in Schenectady, NY, 1942-1946, New York, NY, 1943-1946, and (in Boston) Cambridge, MA, 1943-1946; Division 16 (Optics and Camouflage), 1940-1946; Division 17 (Physics), 1940-1946; Division 18 (War Metallurgy), 1940-1946; and Division 19 (Miscellaneous Weapons/sabotage and espionage devices), 1942-1946. Architectural and Engineering Plans (3,400 items): Division 1, special projectiles, gun tubes, and liners, 1942-1946; Division 2, miscellaneous projects, 1940-1945; and Division 16, glare protector, optical glass, scanning devices, and other projects, 1942-1946. Photographs (1,127 images): Division 3, apparently of some of the unidentified glass negatives cited below, n. d. (59 images). Division 4, fuses, assembly lines, machining equipment, and toss bomb tests, 1944-1945 and n.d. (234 images). Division 6, sonar research, tests, and equipment, including transducers, small target detection, marker buoys, and float lights, primarily representing contract work by Columbia University and Harvard University underwater laboratories, 1943-1945 and n.d. (834 images). Photographic Prints (87 images): Investigations in underwater ballistics conducted by the Morris Dam Group (Section IV, NDRC Physics 3) under a contract with the California Institute of Technology (Morris Dam Report No. 153), 1945. Photographic Negatives (1,000 images): Division 12 tests of the DUKW amphibious vehicle, 1942. Glass Negatives (89 images): Division 3, unidentified, n.d. Records of panels and committees: Correspondence, studies, reports, and staff member office files of the Applied Mathematics Panel, 1942-1946; the Applied Psychology Panel, 1942-1946; the Committee on Propagation (of radio waves), 1943-1946; and the Tropical Deterioration Administrative Committee, 1944-1946. Records of the Committee on Medical Research (CMR), 1940-1946 (86 lin. ft.): General correspondence, including subcommittee minutes and reports, 1940-1946. Minutes, with subject index, 1941-1946. Records relating to contracts, 1941-1946. Correspondence relating to the distribution of contractors' reports, 1944-1946. Office files of Penicillin Committee Chairman Dr. Hans Clarke, 1943-1945. Records of the Liaison Office, 1940-1947 (121 lin. ft. and 12 rolls of microfilm): General records: Subject-numeric correspondence, 1940-1946. Subject-numeric policy and procedure files, 1941-1946. Correspondence concerning the receipt and distribution of British reports, 1941-1945. Correspondence, requisitions, and receipts relating to radar equipment sent to the United Kingdom under the lend-lease program, 1942-1945. Records, and microfilm copy of records, relating to a commercial radar exchange agreement, 1942-1945 (12 rolls). Field office correspondence, 1944-1945. Records of the London Mission: Subject correspondence, 1941-1946. Correspondence and reports regarding the Combined Intelligence Objectives Subcommittee, 1941-1946. Correspondence with various NDRC divisions and the CMR, 1941-1946. Personnel files, 1941-1946. Incoming and outgoing cable messages, 1941-1946. Drafts of histories of the London Mission, 1946-1947. Records of the Scientific Personnel Office, 1943-1946 (6 lin. ft.): Correspondence with contractors, 1943-1946. Records of the Office of Field Service (OFS), 1943-1946 (23 lin ft.): Project files, 1943-1946. Administrative files, 1943-1946. Correspondence concerning OFS liaison activities with various federal government and United Kingdom scientific agencies, 1943-1946. Subject files of the Operations Research Group for the Pacific Ocean Area, 1944-1945. Office files of Dr. H. K. Stephenson, head of the Southwest Pacific Research Section, 1944-1945. Drafts, 1943-1946, with accompanying documentation, of OFS histories, published as portions of OSDR official histories, Scientists Against Time (1946) and Combat Scientists (1947). Records of Laboratories Under Contract with OSRD, 1940-1946 (1,441 lin. ft.): Records of the Radiation Laboratory (RL), Massachusetts Institute of Technology (MIT): Central correspondence, 1940-1946. Case files of the Office of the Historian, 1944-1946. Case files of the Transition Office, 1941-1946. Records of the Office of Publications, including correspondence and drafts of manuscripts, 1945-1946. Records of the Patent Office, consisting of correspondence, 1940-1946, and invention reports, with supporting data notebooks, 1940-1946. Minutes of the the Coordinating Committee, 1941-1945. Correspondence, minutes, and other records of the Standards Committee, 1942-1945. Case files of the Project Committee, 1944-1945. Correspondence, minutes, reports, and other records of component divisions and groups, 1941-1945. Correspondence, reports, and other records of the British Branch RL, Great Malvern, England, 1943-1945. Partial set of RL technical reports, 1940-1946. Records of Project Cadillac (airborne radar for early warning of surface ships), 1944-1945. General index to RL records, 1941-1946. Architectural and Engineering Plans (35,000 items): Equipment and devices developed by the laboratory, including drawings of the magnetron radar transmitter and modifications, operating charts, and antenna modification charts, 1940-1946. Photographic Prints and Negatives (18,600 images)