Little or no attention has been given to the vital subject of exercise as a curative means. In many cases treated by Ling's methods, when skilfully applied, the results have been so marvellous that medical men who had not studied the philosophy of the Movement Cure have attributed the rapid improvement to Animal Magnetism. They could not conceive that muscular exercise alone could produce such wonderful results. Symmetry of body and mind is vital to health. Its loss in the mind leads not unfrequently to insanity,--its loss in the body to numberless maladies. The great defect in our system of education lies just here. There is no discrimination between the members of a class, part of which needs one kind of culture to produce symmetry and health, while another part needs quite another. The gymnasium, where all perform the same exercises, may be charged with the same radical defect. In a school for thorough mental or physical training, pupils must be classified and trained with reference to their individual needs. This principle underlies the successful treatment of consumption. He who would contribute to its cure by exercise--the most efficient of all possible remedies--must not say to his patients simply, "Exercise, exercise, exercise," but he must distinctly mark out those exercises which are precisely adapted to the case of each. As an additional reason for discrimination in prescribing physical exercises for consumptives, it may be mentioned that in almost every patient belonging to this class there are complications with other diseases each of which requires consideration. EXERCISES POSSESSING PECULIAR VALUE FOR CONSUMPTIVES. Most consumptive invalids are indisposed to exercise, and particularly indisposed to employ their arms. Many attempt training of the shoulders and chest, and abandon it in disgust. But if in the systematic performance of the exercises other persons are interested, the patient cannot withdraw. Besides, those exercises in which others participate have social attractions, to which consumptives, as a class, are peculiarly susceptible. For example, a consumptive young lady has brothers who assist her in certain prescribed exercises. These are to be executed twice a day, at hours when the brothers are at home. There is an affectionate interest in the group with reference to the pleasant duty. It is not forgotten. Suppose the brother is the patient, the sisters or mother will act as assistants. In every family such exercises are sure of the proper attention. I need scarcely say, that, if the patient undertake to exercise alone, with dumb-bells or some similar means, it will soon grow tiresome, and be abandoned.