WilliamJames's famous book, The Varieties of Religious Experience, appeared in 1902. Ever since that date studies of the psychology of mysticism have poured from the press. In our own country we may name Evelyn Underhill, Mrs. Herman, and von Hügel. In France, Bastide, Murisier, Récéjac, Boutroux, Delacroix, Janet, Poulain, Bremond, Bergson, Bréhier. In America, besides William James, Starbuck, Leuba, Coe, Hocking, Rufus Jones, P. E. More, Pratt, Royce, Bennett. These lists are far from complete. In Germany the subject seems to have aroused less interest; but Otto, not long before his death, published a book dealing with it.