These papers consist mainly of records of the Astrophysical Observatory (also abbreviated APO) under the Directorship of Samuel P. Langley, Charles G. Abbot, and Loyal B. Aldrich.
The National Aeronautical Association (NAA) was created to advance the art and science of aviation and related subjects and the diffusion of knowledge thereof by educational means.
This finding aid was digitized with funds generously provided by the Smithsonian Institution Women's Committee.
Manuscript and printed textual material, photographic prints and negatives, slides, audio tapes, film, original and reproduction artwork, maps, scrapbooks, and historical and natural artifacts related to the history of African exploration and natural history, dating primarily from the nineteenth and twentieth centuries. Includes correspondence, drafts of publications, diaries, account books, ephemera, posters, newsclippings, biographies, memoirs, portraits, and the former personal property of selected explorers, big game hunters, missionaries, pioneers, and naturalists in Africa.
The Technical Reference Files comprise an artificial collection that currently contains 1,900 cubic feet of aviation and space related materials, organized in 22 subject series. File materials include photographs, press releases, clippings, correspondence, reports, and brochures, on individuals, organizations, events, and objects.