The persuasion that tuberculosis is not hereditary will do much to encourage patients suffering from the disease to feel that they are not hopelessly doomed. At the present time it is not unusual to find patients so discouraged, when told that they have tuberculosis, that it is almost impossible to secure a favourable reaction to any mode of treatment. They have seen members of families die one after another, or they have heard stories of the inevitable way in which consumption wiped families out of existence, and they give up hope and become quite cast down. Needless to say, while in this condition any treatment is practically hopeless. On the other hand, the conviction that tuberculosis is only an infectious disease, quite curable in the majority of cases if taken in time, is of itself a most important aid in the treatment of the disease, since courage and faith are the principal requirements for successfully combating the affection. We have had any number of newly invented remedies for consumption in the last twenty-five years. Scarcely a year has passed in which some new form of treatment, often eventually proved to be the resuggestion of an old therapeutic method, has not been heralded as a positive cure for consumption. In every case the first patients treated by the discoverer of the new remedy have rapidly improved under his care. In the hands of others, however, such results have not been obtained, or only for a very short time at the beginning of the treatment. After a time the new remedy failed in its inventor's hands. The true reason for the improvement was then seen to be, not the remedy suggested, but the favourable influence on the mind of consumptives produced by the faith of the inventor in his remedy, and their reaction to this powerful suggestion when they were put under proper conditions of an abundance of fresh air and a plentiful diet.