It was a foregone conclusion that as soon as LSD became the daring, far-out thing to take, entrepreneurs would be gin to peddle psychedelic accessories the stuff to take on the trip. The paraphernalia ranges from such objects of contemplation as a polished cow's tooth ($2.50) to poster-size enlargements of current underground heroes such as Lenin, Dostoevsky and Oscar Wilde. But not even Thomas DeQuincey in his wildest opium-pipe dream could have imagined the success that such accessory shops are beginning to enjoy.
Psychedelic central for the U.S. right now is a half-mile stretch along San Francisco's Haight Street, which has...