Deterrent Pain.--A striking illustration of a strong mental influence helping out a slight amount of therapeutic efficiency is found in the use of the actual cautery for medical affections. At a number of times in history most of the chronic pains and aches, the arthritises, the so-called gouty tendencies when localized, the rheumatic affections and especially the chronic rheumatisms, have been treated by means of the cautery. All of the neuralgias, many of the neuroses, all of the neuritises and a certain number of so-called palsies and paralyses, were treated successfully by this means. It is a very suggestive remedy producing a deep impression that now relief must be in sight. It {68} became popular over and over again, though after a time it always lost its influence, and ceased to have the beneficial effects that it had at the beginning of its reintroduction. During the second half of the eighteenth and the beginning of the nineteenth century the cautery became very popular. It was applied particularly in the form of the moxa. A cylinder of cotton was employed for this purpose, being set on fire and allowed to burn on the skin of the patient, producing a deep wound. The mental effect of this can be readily understood. Baron Larrey, one of the most eminent surgeons of the time, thought the moxa one of the best aids that he had in the treatment of many affections where the knife was not indicated. There were large groups of diseases in which it was almost a specific. Larrey employed it in affections of vision, of smell, of taste, of hearing and of speech. In many paralytic affections of the muscular system, in all chronic affections of the head, among which he enumerates non-traumatic affections, hydrocephalus, chronic headaches and many other affections supposed to be seated in the cranium. In asthma he was particularly successful with the moxa. Old catarrhal affections yielded to it. Consumption was frequently benefited by it. Most of the chronic affections of the uterus were benefited, as were also similar affections of the stomach. He considered that the moxa must be admitted, without contradiction, to be the remedy _par excellence_ against rachitis. In Pott's disease, which he called dorsal consumption, it worked wonders. In sacrocoxalgia, in cocygodynia and femero-coxalgia he had excellent results with the moxa.