People with serious diseases of the heart, arteries or of the kidneys should not take protracted or severe baths. To sum up the use of water on the skin: Use enough to be clean. No more is necessary. The application of water should be followed by thorough drying and dry rubbing. If the reaction is poor, do not remain in cold water long enough to produce chilling. As a rule thin people should use but little cold water, and they should never remain long in cold water. Water intelligently applied to the skin in disease is a splendid aid in cleansing the system. It is surprising what a great amount of impurity can be drawn from the body by means of wet packs. However, this is a treatise on health, so we shall not go into details here regarding hydrotherapy. No matter what one's ideas may be on the subject of bathing, there can hardly be more than one opinion regarding the application of dry friction to the skin. Those who have noted its excellent results feel that it should be a daily routine. It should be practiced either morning or evening, or both. From five to ten minutes spent thus daily will pay high dividends in health. A vigorous rubbing is exercise not only for the skin, but for nearly every muscle in the body. The dry rubbing keeps the surface circulation vigorous. The surface circulation, and especially the circulation in the hands and the feet, is the first part that begins to stagnate. Blood stagnation means the beginning of the process which results in old age. In other words, dry friction to the skin helps to preserve health and youth. Skin that is not exercised often becomes very hard and scales off particles of mineral matter. If women would put less dependence on artificial beautifiers and more on scientific massage, they would get much better results. They would avoid many a wrinkle and save their complexions. The neck and the face should never be massaged downwards. The strokes should be either upwards or from side to side, the side strokes generally being toward the median line. Such massaging will prevent the sagging of the face muscles for years and help to keep the face free from wrinkles and young in appearance. The massaging should be rather gentle, for if it is too vigorous the tendency is to remove the normal amount of fat that pads and rounds out the face. Men can do the same thing, but most men have no objection to wrinkles.