To test impressibility apply the fingers upon the organ of Somnolence, an inch horizontally behind the brow, with a very gentle contact; your subject, after a few minutes, will manifest a sensitiveness of the eye, and will wink oftener than usual--his winking will be repeated and prolonged, until his eyelids droop or remain closed--he is now somnolent and dreamy; and this condition may be prolonged until it becomes the Mesmeric Somnolence, or may be promptly removed by brushing the excitement off with the fingers. A very simple test of impressibility consists in passing the ends of the fingers over the palm of the hand of the subject, within one or more inches, and ascertaining whether he can recognize its passage by any impression. If impressible he will perceive a cooling sensation as the fingers pass. A more perfect demonstration is to let your subject stand erect before you, and apply both hands gently over the forehead and moral organs, or upon the temples; then very slowly withdraw them, and continue this process until you perceive that as your hand is withdrawn, the head seems inclined to follow it as if attracted; some will move thus but an inch or two, others will be drawn forward and compelled to follow you wherever you go, or may be drawn down and prostrated upon the floor. You may accomplish the same upon the back of the head or body--the hand or any other part which is free to move; but the forehead is the best region, because the front lobe is the seat of Impressibility, and the operation cultivates that quality, by drawing excitement into the brain, and especially the front lobe, thus debilitating the muscular system and power of resistance. Apply the fingers upon the organ of Relaxation, below the cheek bone, and your subject, if standing, will become enfeebled, unsteady in attitude, and incapable of supporting as great weight as before in his extended hand. This will be counteracted by touching the region of Energy. The most painful experiments may be made by placing the hands upon the temples and face, so as to cover the regions of Sensibility, Disease, Relaxation, and Irritability--the effect of which would be to produce bodily weakness, sickness, pain, distress and general prostration; a condition, which if not relieved, might result in severe disease, but which may be counteracted by dispersing the excitement upward and backward, and by stimulating Health, Energy and Hardihood. By grasping a metallic rod firmly in the hand while the other end of it rests in the relaxed hand of an impressible person, you may transmit a current of nervaura, which he will recognize gradually entering his arm at the hand, passing slowly up to the shoulder, and then diffusing itself over the body.