It is obvious from the above that we do not consider it proper to aim chiefly at a deepening of the hypnosis in every case, and it is very important to decide whether a treatment requires superficial or profound hypnosis, for the reason that the patient's mind must be duly prepared at the outset. We shall therefore now take up the question of what states require profound hypnosis and what states require only superficial hypnosis. The following general rule may be stated: Profound hypnosis is as a rule necessary: (1) in the illumination of amnesias(*) (2) in influencing organic symptoms; (3) in strengthening the desire to break a habit, in addicts.

(*)To be sure, Frank rejects profound hypnosis in his cathartic hypnotic-treatments and operates with hypnoses of medium profundity.

As a matter of principle, profound hypnosis is not necessary in neurotic disturbances, although it may be desirable in individual cases,

Let us now investigate specific problems.