Correspondence, 1880s-1953; manuscripts by Zahm; diaries, 1930-1941; publications and clippings by and about Zahm; correspondence, reports and other records concerning his involvement with the Smith sonian Institution, the National Advisory Committee for Aeronautics, the Committee on Aerodynamics, the Library of Congress-Division of Aero nautics, the Institute of Aeronautical Sciences, and the War Department; material collected by Zahm concerning the North Pole; records of his experiments including notes, design memoranda, lab records, note books, sketches, blueprints, copyright and patent material; teaching and lecture notes; financial records; and personal effects including a will, membership cards and addresses.