If abnormalities are found, a physician should be consulted. Often corrective exercises are all that is needed, and no one should put braces of any kind upon a child unless they have been prescribed by a physician. No attempt should be made to correct the common tendency of children to toe in or "walk pigeon-toed." Toeing-in is a natural manner of walking during the formative period and tends to strengthen the arch of the foot, while toeing-out tends to weaken the arch and to cause flat foot or broken arches. PREDISPOSITION TO NERVOUSNESS.--Heredity plays an important rôle in the predisposition to nervousness, so that children of nervous parents are particularly likely to show nervous instability. It is, however, difficult to say in a given case how much of his nervousness a child inherits and how much he acquires by imitating the irritability, the out-breaks of temper, and the other evidences of imperfect emotional control displayed by his nervously disposed parents. On the other hand, even children of nervous predisposition sometimes overcome their defects to some extent by imitating parents who have acquired self-control. Children predisposed to nervousness should be watched with special care, but they should not be allowed to realize that they are the objects of unusual solicitude. They need the most favorable surroundings that can be obtained, and their general health should be maintained at the highest possible level. Any condition that lowers vitality tends to increase their troubles; nervousness may be caused among children of good inheritance, and increased among others, by poor nutrition, lack of exercise and play out-of-doors, fatigue, loss of sleep, eyestrain, adenoid growths, and the poisons of infectious diseases. It is characteristic of many nervous children that they are too easily stimulated; they may be excitable, restless, unnaturally quick in moving, over-sensitive to pain and discomfort, easily fatigued, irritable in temper, and unable to control the emotions. They frequently make involuntary motions like grimacing and winking the eyes. Children of low nervous tone, however, are not necessarily excitable. A nervous child may be muscularly weak, awkward in gait, listless, dull, clumsy, forgetful, and inattentive. Such children often suffer from cold hands and feet and from profuse perspiration. Much can be done for these unfortunate children by removing the cause of their troubles if possible, by giving them simple and wholesome surroundings, by suiting their occupations to their strength, by eliminating mental strain, particularly during the adolescent period, and by training them to control their minds as well as their bodies.