Records relate to government contract research in sonar and underwater acoustics at Harvard Underwater Sound Laboratory during World War II. Includes administrative records of Director F. V. Hunt and Associate Director C. P. Boner; correspondence with various companies concerning placement of laboratory personnel after project completion; photographs of experiments and apparatus, and blueprints; staff memoranda; personnel records; staff roster, 1946; and project report, 1945. Files of Director, F.V. Hunt, contain correspondence, memoranda, personnel lists, contracts, minutes and related documents of the Administrative Council, office logs, clippings and manuscript history of laboratory, and items relating to dismantling of the laboratory after termination of its contract. Also included are log books of experimental vessels, reports distributed outside the laboratory including the Office of Scientific Research and Development relating to research progress, apparatus, and related matters.