Scope and Content Correspondence, 1889-1953; manuscripts by Zahm; diaries, 1930-1941; publications and clippings by and about Zahm; correspondence, reports, and other records concerning his involvement with the Smithsonian Institution, the National Advisory Committee for Aeronautics and its Committee on Aerodynamics, the Library of Congress Division of Aeronautics, the Institute of Aeronautical Sciences, and the War Department; material collected by Zahm concerning the North Pole; records of his experiments...