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Neutrinos from the Sun

NEUTRINO TRAP is a tank filled with 100,000 gallons of a common cleaning fluid, tetrachloroethylene. It is located in a rock cavity 4,850 feet below the surface in the Homestake Mine in the town of Lead, S.D. The experiment is being run by Raymond Davis, Jr., Kenneth C. Hoffman and Don S. Harmer of Brookhaven National Laboratory. Suggested in 1964 by Davis and the author, the experiment was begun last year. The first results showed that the sun's output of neutrinos from the isotope boron 8 was less than expected.