This remarkable effect is achieved by the use of countless plastic linear lenses which separate the multiple images laminated behind them, permitting a different picture to change continuously as you change the angle of view or distance. Naturally this device is extremely helpful in capturing the full attention of the conscious mind of the subject and helps you to achieve the hypnotic state in the shortest possible time. Send for THE HAND HYPNODISC Price $1 POWERS HYPNOTIC CRYSTAL BALL [Illustration] The Powers hypnotic crystal ball is extremely useful as an aid in inducing the hypnotic state. It is desirable to use it as an object of concentration for your subject while he is being hypnotized. The crystal ball lends an air of "mysticism" to the attainment of the hypnotic sleep and for some of your subjects this is the best approach in obtaining hypnotic control. There are individuals who will not react to a strict scientific approach to hypnosis and it is with these subjects that the use of such a device as the crystal ball is of inestimable value. The crystal ball is held between your thumb and first finger, about twelve inches from the subject's eyes and slightly above eye level. The hypnotic crystal ball can easily be carried with you at all times. As you know, the employment of a crystal to induce the hypnotic sleep is one of the oldest methods used in hypnosis. I personally favor this device and my students as well as myself have always had excellent results using this technique. Send for POWERS HYPNOTIC CRYSTAL BALL Price $1 THE POWERS HYPNODISC [Illustration] Copyright 1951 by Melvin Powers An effective yet inexpensive method of inducing hypnosis is with the aid of the hypnodisc spiral. In my book, "Hypnotism Revealed," a picture of the hypnodisc unit with the hypnodisc spiral attached is shown. Above is a picture of my latest hypnodisc spiral. I am now offering the hypnodisc spiral as a separate unit which can be used with your phonograph turntable. The spinning spiral will cause a series of optical illusions, causing immediate eye strain and fatigue. The subject feels that he is being drawn into a deep, dark revolving cone. By your suggestions of hypnotic sleep, you can place your subject in the somnambulistic state very easily. With some subjects, hypnosis will take place almost instantaneously. This technique is often employed in stage hypnotism.