It must be noted, however, that the phenomena of hypnotism are due solely to the influence of the imagination. The quasi-scientific explanations which attributed them to magnetism, electricity, some subtle animal fluid, some occult force, and so forth, have been as completely negatived as the supernatural explanation. We have seen that painted wooden tractors were as effectual as the metal tractors of the earlier mesmerists; a small disc of card or wood is as effective as the disc of zinc and copper used by the electro-biologists; and now it appears that the mystical influence, or what was thought such, of the operator is no more essential to success than magnetic or electric apparatus. Dr. Noble of Manchester made several experiments to determine this point. Some among them seem absolutely decisive. Thus, a friend of Dr. Noble's had a female servant whom he had frequently thrown into the hypnotic state, trying a variety of experiments, many of which Dr. Noble had witnessed. Dr. Noble was at length told that his friend had succeeded in magnetising her from another room and without her knowledge, with some other stories even more marvellous, circumstantially related by eye-witnesses, 'amongst others by the medical attendant of the family, a most respectable and intelligent friend' of Dr. Noble's own. As he remained unsatisfied, Dr. Noble was invited to come and judge for himself, proposing whatever test he pleased. 'Now had we visited the house,' he says, 'we should have felt dissatisfied with any result,' knowing 'that the presence of a visitor or the occurrence of anything unusual was sure to excite expectation of some mesmeric process.' 'We therefore proposed,' he proceeds, 'that the experiment should be carried on at our own residence; and it was made under the following circumstances:--The gentleman early one evening wrote a note as if on business, directing it to ourselves. He thereupon summoned the female servant (the mesmeric subject), requesting her to convey the note to its destination, and to wait for an answer. The gentleman himself, in her hearing, ordered a cab, stating that if anyone called he was going to a place named, but was expected to return by a certain hour. Whilst the female servant was dressing for her errand, the master placed himself in the vehicle and rapidly arrived at our dwelling. In about ten minutes after the note arrived, the gentleman in the meantime being secreted in an adjoining apartment, we requested the young woman who had been shown into our study, to take a seat whilst we wrote the answer; at the same time placing the chair with its back to the door leading into the next room which was left ajar. It had been agreed that after the admission of the girl into the place where we were, the magnetiser, approaching the door in silence on the other side, should commence operations. There, then, was the patient or "subject" placed within two feet of her magnetiser, a door only intervening, and that