Larry Harnish / Larry Harnish, mediums, psychics, seances / Mark Twain / 0 comments Science and the Occult July 24, 2006 July 24, 1907 Los Angeles On a speaking tour of America, former Columbia professor James H. Hyslop is trying to raise interest in a scientific approach to psychic research while deflating the fabulous claims of mediums and other fakers.