[IX-12] Gold, E. “Thunderbolts: The Electric Phenomena of Thunderstorms,” _Nature_, Vol. CLXIX (1952), pp. 561–63. [IX-13] Kogan-Beletskii, G. I. “The Nature of Ball Lightning,” _Priroda_, No. 4 (1957), pp. 71–73. (Translated in [IX-8].) [IX-14] Schmidt, R. O. “The Kearney Incident,” _Flying Saucers_ (October 1959), p. 31 ff. [IX-15] _UFO Critical Bulletin_, Vol. II, No. 2 (March-April 1958). [IX-16] “The Case of the Radioactive UFO,” _Flying Saucers_ (February 1958), p. 30. [IX-17] “Electro-magnetic Effects Associated With Unidentified Flying Objects (UFO’s),” Subcommittee of the National Investigations Committee on Aerial Phenomena (NICAP), Washington, D.C. (June 1960). [IX-17a] _Sky and Telescope_, Vol. XXIII (1962), p. 323. [IX-18] Michel, A. _The Truth about Flying Saucers._ New York: Criterion Books, 1956. [IX-19] Keyhoe, D. E. _The Flying Saucer Conspiracy._ New York: Henry Holt & Co., 1955. [IX-20] Scully, F. _Behind the Flying Saucers._ New York: Popular Library, 1951. [IX-21] Cramp, L. G. _Space, Gravity and the Flying Saucer._ New York: British Book Centre, 1955. _Chapter_ X CONTACT! All fields of human activity have their practical jokers. Elaborate hoaxes have been perpetrated in music, art, literature, history, religion, science--and in the world of flying saucers. Although the motives for such swindles are not always obvious, the trickster is usually trying to promote a cause, to gain fame and/or prestige, to make money, to satirize a folly, or just to have some fun at the public’s expense. Some hoaxes, such as Mark Twain’s petrified man, produce only harmless amusement. Others, planned as serious deceptions, can cause long-lasting damage. The celebrated Piltdown man was fraudulently created from an ape’s jawbone, a stray tooth, and a few chemical staining agents; it gained fame for the scientists involved but threw the study of human evolution into a confusion that lasted more than twenty years, until the forgery was revealed in every detail[X-1].