Though various methods of producing the hypnotic sleep are in use, the rule is now that, in the course of a hypnotizer's experience, less and less external auxiliaries of any kind are needed, and more and more dependence is placed on the bringing about of mental _rapport_ between the active and passive agencies in hypnotism by persuasion and command. If the hypnotic sleep has once been obtained, usually all that is necessary is a few gentle words, and then the command to sleep. It is at the initial attempts to hypnotize a particular person somewhat refractory to the condition that auxiliaries are needed. In these cases it is often well to tire the eyes of the patient. This is done by directing them to the fingers of the operator held well above the patient's head. After a minute or two of effort the distinct fatigue which occurs may induce forgetfulness of everything else and cause absorption in the single idea of attending only to the hypnotizer's suggestions. This constitutes the beginning of hypnotism. Occasionally the flash of a bright object, or a revolving mirror, may be used, but these are only adjuncts and may be dispensed with entirely if the operator has the patience and the time to give to the subject. Accessories.--Some operators use a mirror on which a ray of light is cast for the purpose of concentrating the attention and bringing about tiredness of the eye muscles. In so far as it has a more universal application, sight is certainly the best sense to act upon. Other senses may be appealed to, as I suggest later. Instead of a mirror, a polished match-box or pencil-case may be used, but as a rule the less artificiality enters into it and the simpler the procedure, the better. One of the inconveniences of using the flash of a bright object is that occasionally patients who are very susceptible may, after they have had a number of hypnotic experiences, be thrown into a hypnotic condition by the flash of a light in the street, or by the reflection of light from a mirror in their own homes. These conditions of facile auto-hypnotism constitute one of the serious dangers of the practice on susceptible subjects. Whatever good may be accomplished by hypnotism will probably be reached during the first half dozen seances. To proceed with the treatment beyond this, if it is employed at regular and short intervals, is almost sure to result in harm rather than good. {156}