This collection includes correspondence, articles, newsclippings, photographs, and recordings, concerning Menzel's next hit documentation of UFOs as natural phenomena explainable in scientific terms. One can find material on the National Investigation Committee on Aerial Phenomena, Project Blue Book, the Velikovsky controversy, and a card file of meteor activity, 1946-1961.

Background note

Donald Howard previous hitMenzel was an astrophysicist.

Collection information


Presented by Donald Howard previous hitMenzel next hit and family, 1963-1982; accessioned, 10/--/1971. See in-house shelf list for additional accession numbers and dates.

Related material

Donald Howard previous hitMenzel's next hit Autobiography is also located in the American Philosophical Society Library (Mss.B.M522).

Indexing Terms

Corporate Name(s)

  • National Investigations Committee on Aerial Phenomena.
  • Project Blue Book (U.S.)


  • Card files.
  • Clippings.
  • Photoprints.
  • Recordings.

Personal Name(s)

  • Botley, Cicely Mary
  • Boyd, Lyle Gifford, 1907-
  • Condon, Edward Uhler, 1902-1974
  • Hynek, J. Allen, (Joseph Allen), 1910-1986
  • Keyhoe, Donald E., (Donald Edward), 1897-
  • Klass, Philip J.
  • Maney, Charles Albert, 1891-
  • Markowitz, William
  • previous hitMenzel next hit, Donald Howard, 1901-1976
  • Quintanella, Hector
  • Sagan, Carl, 1934-1996
  • Schreibsten, Norman
  • Velikovsky, Immanuel, 1895-1979
  • Wellman, Wade


  • Astronomy.
  • Meteors.
  • Unidentified flying objects.