The bodies of children are composed largely of water. The structures are flexible and elastic. The bones are made up mostly of cartilaginous structure. As the children grow older more solids are deposited in the body and the proportion of solid matter to water grows greater. Lime is deposited in the bones. When they are limy throughout they are said to be ossified. After this process is complete no more growth can take place. Bone formation continues until about the age of twenty-five. At this age the body is efficient. The fluids circulate without obstruction. Could this condition be maintained, there would be no decay. During the early years of life the food intake in proportion to the weight of the body is great. The child is active and uses much fuel to produce power and to repair the waste. Considerable food is required for body building. At this time a broken bone mends quickly and cuts heal in a short time. With advancing years come slowness and sluggishness of the various vital activities. The slowing up can be retarded almost indefinitely by proper care of the body. If the circulation could be maintained and the purity of the blood stream guarded, old age would be warded off. A healthy body is able to cleanse itself under favorable conditions and so long as the body is clean through and through there is no opportunity for disease to take place and there can be no aging. By aging I mean not so much the number of years one has lived as the amount of hardening and degeneration of the body that take place. Some are as old at forty as others are at seventy. When people have reached physical maturity they should begin to reduce their food intake. There is no need for building material then. All that is necessary is enough to repair the waste and to keep up the temperature. The individual at twenty-seven should eat a little less than when he was twenty and by the age of thirty-five he should have reduced his food still more and made his meals very simple. Children enjoy the gratification of the sense of taste, but at the age of thirty-five a man has lived enough and experienced enough so that he should know that the overgratification of appetites is an evanescent and unprofitable pleasure, always costing more than it is worth. It is best to grow into good habits while young, for it is difficult to do so after one has grown old. The man who reforms after fifty is the exception.