There are two distinct states of hypnotism. The first is that in which most platform experiments are made. The sensitive is capable of carrying on conversations, answering questions, and is governed by a “dominant idea,” believing all the operator wishes, and doing as commanded. The sensitive rapidly enters the next stage, when he becomes insensible to pain, and irresponsive to the address of any one except the operator. Until this stage is reached consciousness and memory are retained, a fact fatal to the theory of automatic action or “unconscious cerebration.” In this profound state the sensitive has no memory of events which occur. It is an induced, incipient somnambulism, the true counterpart of that which under proper condition appears spontaneously. The report of the Committee on Hypnotism, vol. I., p. 95, of Proceedings of American Society for Psychical Research, shows that it confined its attention to fifty or sixty students of Harvard College. Of these about a dozen were affected, and of these, two were so good that attention was confined to them. “The extraordinary mixture, in the hypnotic trance, of preternatural refinement of discrimination with the grossest insensibility, is one of the most remarkable features of the condition. A blank sheet of paper, with fine-cut edges, without watermarks or any thing which could lead to the recognition of one side or edge from the other, is shown to the subject with the statement that it is a photograph of a well-known face. As soon as he distinctly sees the photograph upon its surface, he is told that it will float off from the paper, make a voyage around the walls of the room, and then return to the paper again. During this imaginary performance, he sees it successfully on the various regions of the wall; but if the paper is meanwhile secretly turned over, and handed to him upside down, or with its under surface on top, he instantly recognizes the change, and seeing the portrait in the altered position of the paper, turns the latter about, ‘to get the portrait right.’” In the hypnotic state the subject is under the control of the operator, and in a great degree an automaton; in the somnambulic, he in part regains his individuality, and in certain lines of thought and action is superior to himself in his waking moments. Natural somnambulism comes without warning, and illustrates the condition induced by mesmeric passes. SOMNAMBULISM.--Sleep waking, or sleep walking, whatever may be its cause, mental derangement by disease or intense exertion of mind or body, or a constitutional inclination thereto, is of deepest interest to the psychologist as proving the independence of the spirit of the physical senses. The somnambulist has lost the use of his senses. He feels, hears and sees nothing by touch, ear or eye, and yet the objects to which his attention is drawn are plainly perceptible.