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Approved For Release Ne UNCLASSIFIED CPYRGHT TESTS OF "EXCEPTIONAL VISION" WITH NUCLEAR EMULSION FILM In nuclear and particle physics research, testing with film is one of the most reliable and convenient ways of detecting natural radioactivity, the presence of pi-mesons, K-mesons, L-hyperons, and other particles. ‘According to initial tests, the majority of persons with "exceptional vision," while exercising their capability, could expose film sealed in a light-proof container with Chinese characters which the subject was attempt- ing to identify. Over 700 tests with X-ray film, over 50 tests with nuclear emulsion film, and numerous tests with ordinary photographic film were conducted, These experiments demonstrated that when the subjects who possessed "exceptional vision" correctly recognized the characters, they: simultaneously produced exposures of the film placed near the charac- ters as well as other unusual effects. Occasionally they were even able to project images of the characters onto the nearby film (Figures 1 and 2). ‘When a microscope was used to observe unusual exposures of a nuclear emulsion film produced by Yu, an individual with “exceptional vision," it was found that most of the silver grains removed from the membrane had accumulated in a surface layer of 0 to 10 mi, The maxi mum depth was about 30 mi. The vertical distribution of silver grains indicated that the influence of unknown radiation is similar to the effect of visible light, but the penetration of this unknown radiation is somewhat deeper into the emulsion, Thorough inspection of the container used for the film test, of the testing methods, and of the brush and paper (for writing the characters), excluded known types of radiation, fluorescence, chemical interactions, light leaks or radioactive decay from producing the observed effect. Com- parison of selected containers of different shapes and materials in various experimental conditions led to the following conclusions: Approved For Release 2000/08) INGALBAPSSHFEARB)0400320001-8