Dr. Cocke says: “I have occasionally seen subjects who complained of headache, vertigo, nausea, and other similar symptoms after having been hypnotized, but these conditions were at a future hypnotic sitting easily remedied by suggestion.” Speaking of the use of hypnotism by doctors under conditions of reasonable care, Dr. Cocke says further: “There is one contraindication greater than all the rest. It applies more to the physician than to the patient, more to the masses than to any single individual. It is not confined to hypnotism alone; it has blocked the wheels of human progress through the ages which have gone. It is undue enthusiasm. It is the danger that certain individuals will become so enamored with its charms that other equally valuable means of cure will be ignored. Mental therapeutics has come to stay. It is yet in its infancy and will grow, but, if it were possible to kill it, it would be strangled by the fanaticism and prejudice of its devotees. The whole field is fascinating and alluring. It promises so much that it is in danger of being missed by the ignorant to such an extent that great harm may result. This is true, not only of mental therapeutics and hypnotism, but of every other blessing we possess. Hypnotism has nothing to fear from the senseless skepticism and contempt of those who have no knowledge of the subject.” He adds pertinently enough: “While hypnotism can be used in a greater or less degree by every one, it can only be used intelligently by those who understand, not only hypnotism itself, but disease as well.” Dr. Cocke is a firm believer that the right use of hypnotism by intelligent persons does not weaken the will. Says he: “I do not believe there is any danger whatever in this. I have no evidence (and I have studied a large number of hypnotized subjects) that hypnotism will render a subject less capable of exercising his will when he is relieved from the hypnotic trance. I do not believe that it increases in any way his susceptibility to ordinary suggestion.” However, in regard to the dangers of public performances by professional hypnotizers, Dr. Cocke is equally positive. Says he: “The dangers of public exhibitions, made ludicrous as they are by the operators, should be condemned by all intelligent men and women, not from the danger of hypnotism itself so much as from the liability of the performers to disturb the mental poise of that large mass of ill-balanced individuals which makes up no inconsiderable part of society.” In conclusion he says: “Patients have been injured by the misuse of hypnotism. * * * This is true of every remedial agent ever employed for the relief of man. Every article we eat, if wrongly prepared, if stale, or if too much is taken, will be harmful. Every act, every duty of our lives, may, if overdone, become an injury.