Symposium on unidentified flying objects: hearings before the Committee on Science and Astronautics, U.S. House of Representatives, Ninetieth Congress, second session, July 29, 1968.

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It has been suggested that spurious optical reflections or light leaks in the
camera might be responsible. Examples of such effects have been examined and
found to be quite different from the UFO's (in the Utah Film).
The evidence remains rather contradictory and no single hypothesis of a natural
phenomenon yet suggested seems to completely account for the UFO involved.
The possibility of multiple hypotheses, i.e. that the Utah UFO's are the result of
two simultaneous natural phenomena might possibly yield the answer. However,
as in the case of the "Montana" analysis, no definite conclusion (as to a credible
natural phenomenon) could be obtained.
REFERENCES
(1) The "American Nautical Almanac" 1950.
(2) H. 0. No. 214, "Tables of Computed Altitude and Azimuth for Latitudes
400 to 49°."
(3) J. Veath, J. G."200 Miles Up," Ronald Press Company, N.Y. Second Edition,
1955, p. 111.
(4) Kaiser, T. R.,"Meteors," Pergamon Press, 1955,
(5) La Paz, L. "Meteoroids, Meteorites, and Hyperbolic Meteor Velocities,"
Chapt. XIX of the Physics and Medicine of the Upper Atmosphere.
(6) 0. C. Farrington,"Meteorites," Chicago, 1915.
(7) "Measurement of Birds." Scientific Publications of the Cleveland Museum
of Natural History, Vol. II,1931.
(8) Kartright, F. H.,"The Ducks, Geese and Swans of North America," Ameri-
can Wild Life Institute, 1943.
(9) Headley, F. W. "The Flight of Birds," Witherly and Co., 326 Holborn,
London, 1912.
(10) Menzel, D. H., "Flying Saucers," Harvard University Press, 1953.
(11) Mees, C. E. K."The Theory of the Photographic Process," Revised Edition,
MacMillan Co., N.Y., 1954.
(12) Danjon, A., Conder, A."Lunettes et Telescopes," Paris, 1935.
(13) Kuiper, G. P., "The Atmospheres of the Earth and Planets," University
of Chicago Press, 1951.
(14) Ruppelt, E. J., "The Report on Unidentified Flying Objects," Doubleday
and Co., 1956.
PART 2.—P1IOTOGRAPHS OF FRAMES FROM THE MOVIE FILMS THAT DR.
BAKER ANALYZED
Blow Up of a Frame from the Utah Film Showing a Typical Formation
of the Objects