It must not be supposed that these practices have entirely disappeared. In a work published as late as 1869 we may read such sentences as, "the clairvoyance of an idiot in a state of somnambulism would inspire me with more confidence if I were sick than the greatest geniuses which grace modern medicine;" and again, "it never could be imagined with what tact, accuracy, and precision, somnambulists account for anything that takes place in them. They are literally present at the performance of all their organic functions; they detect in them the slightest disorder, the minutest change. Then of all this he forms a clear, exact, and mathematical idea. He could tell, for instance, how many drops of blood there are in his heart; he knows, almost to a gramme, how much it would require to satisfy his appetite at the moment; how many drops of water would be necessary to satisfy his thirst, and his valuations are inconceivably exact. Time, space, forces of all kinds, the resistance and weight of objects, his thoughts, or rather his instinct measures, he calculates, appreciates all these matters by a single glance of the eye." In the lectures and cheap compendiums telling "How to Mesmerize," and giving "The Whole Art of Mesmerism," by which the traveling mesmerists of yesterday, if not of to-day, extend their fame, one may find these very same doctrines side by side with garbled accounts of recent discoveries in hypnotism. But we have already dwelt too long upon the aberrations of the human intellect, in which the ludicrous and the solemn are so curiously combined. X