patients began to get excited, and many of them went into convulsions. Amongst them walked Mesmer, clad in an imposing dress suggestive of mystery and carrying a long wand of alleged magic power; often calming those who had already reached the stage of being actually convulsed. His usual method of producing something of the same effect at private séances, was by holding the hand of the patient, touching the forehead and making “passes” with the open hand with fingers spread out, and by crossing and uncrossing his arms with great rapidity. A well-attended séance must have been a curious and not altogether pleasant experience even to a wholesome spectator in full possession of his natural faculties. The whole surroundings of the place together with the previously cultured belief; the dusk and mystery; the “mysterious sympathy of numbers”--as Dean Farrar called it; the spasmodic snapping of the cords of tensity which took away all traces of reserve or reticence from the men and women present; the vague terror of the unknown, that mysterious apprehension which is so potent with the nerves of weak or imaginative people; and, it may be, the slipping of the dogs of conscience--all these combined to wreck the moral and mental stability of those present, most of whom it must be remembered were actually ill, or imagined themselves to be so, which came practically to the same thing. The psychical emotion was all very well in the world of pleasure; but these creatures became physically sick through nervous strain. As described by the historian, they expectorated freely a viscous fluid, and their sickness passed into convulsions more or less violent; the women naturally succumbing more readily and more quickly than the men. This absolute collapse--half epileptic, half hysterical--lasted varying periods according to the influence exercised by the presence of the calm, self-reliant operator. We of a later age, when electric force has been satisfactorily harnessed and when magnetism as a separate power is better understood, may find it hard to understand that the most advanced and daring scientists of the time--to whom Frederic-Antoine Mesmer was at least allied--were satisfied that magnetism and electricity were variants of the same mysterious force or power. It was on this theory that he seems to have worked his main idea to practical effect. The base of his system was animal magnetism, which could be superinduced or aided by mechanical appliances. He did not deceive himself into believing that he had invented the idea but was quite willing to make the utmost use he could of the discoveries and inventions of others. So far as we can gather his intentions from his acts, the main object in his scientific work was to simplify the processes of turning emotion into effect. Magnetism had already been largely studied, and means were being constantly sought for increasing its efficacy. Father Hehl had brought