With the invention of modern machinery and the monotony of specialized work in the mills and factories, it is natural that this should bring with it, if not entirely new diseases and deformities, at least a greater number than have heretofore been known. Consider the little children in the cotton mills, standing for long periods, with the weight of the body thrown on one foot—a position, which causes curvature of the spine. Again consider the young girls still in their “teens” bending over sewing machines from morning until night from year to year; their premium for this work is right sided lateral curvature. Sitting with one leg crossed over the other as in sewing, carrying books under the arm to and from school, lifting and carrying heavy burdens, bundles, or small children, such as the abused and deformed “little mothers” spend their play time in doing—all cause curvature of the spine. Curvature is one of the most common deformities. Any position which throws the spinal column out of its natural line for any length of time is likely to produce it. Regular exercise in the open air will do much to prevent this, together with walking and dancing. If curvature is already noticeable, then it is best to get professional instructions and follow them closely. Next to the rapid bony development, the changes in the heart and circulation are most noticeable. The heart grows more rapidly during the adolescent age than the arteries do, which increases the supply of blood in the arteries and causes general circulatory disturbance of which we see many outward signs such as blushing, nose bleed, headache, cold feet and hands, anaemia, loss of appetite, or an appetite so capricious as to drive one frantic trying to satisfy it, for it jumps from ice cream soda to dill pickles, according to whim. Some of these symptoms require special attention, particularly in the case of the girl at school or in an office, who finds her work a great effort, tires easily, and becomes pale and nervous. Such a girl should spend as much time as possible in the open air, and build up on milk and eggs. Sometimes a simple iron tonic will do much to overcome these disturbances. Pimples on the face are also very common at this period. Physicians assert that with cleanliness of the skin and regularity of the bowels, these symptoms will disappear without the aid of medicines or cosmetics. The above mentioned symptoms are of great annoyance to the adolescent girl, who is just developing pride in looking neat and keeping up an appearance of daintiness, and she goes to unending trouble to rid herself of facial blemishes, which often seem to grow worse and if tampered with, leave ugly scars.