A. Hofmann first noted that extraordinary psychic symptoms were induced by LSD-25 (D-lysergic acid diethylamide). Subsequently, W. A. Stoll25and G. Condrau5discussed these symptoms from a phenomenological point of view. Since then numerous studies have been made including those by J. Delay,7M. Rinkel,21W. Frederking,8,9S. Salvatore,22and H. Isbell and associates.12In spite of these...