All the exercises from the very first, have a bearing upon the establishment of the normal conditions of the spine. If the exercises are well practiced, especially the elevation and expansion of the chest, the spine is strengthened and its normally proportioned curves are established. Bad positions in sitting are extremely common. Book-keepers, editors, seamstresses and children in school need careful attention. Special exercises should be given, such as the "harmonious expansion of the chest" in sitting and the use of the arms to develop the uprightness of the torso. Bad positions in sitting are often due to a false sense of rest. Muscles not acting harmoniously tend to completely collapse. Many people sit without true rest, and are continually shifting their position in a vain search for rest. What is rest? The chief rest comes through the alternation of activity and passivity, that is, through rhythm. Passivity alternating with activity brings rest to the human heart and is the best mode of rest. Rest also results from normal functioning. A person can sit or stand in true poise, giving freedom to breathing, and be able to rest much more truly than in an unnatural, abnormal, collapsed condition. This can be well illustrated by the fact that when a person starts out to walk with the chest slumped, the head hung down and with all the vital organs cramped, he comes back more weary than rested. In walking we should, as has been shown, keep the chest well expanded, the body elevated, co-ordinating all the normal relations of parts. If we walk in this way it tends to rest rather than to weary us. Therefore stand sympathetically expanded and easily tall. Walk in the same way and sit in the same way. Let there be a certain exhilaration and a sense of satisfaction. 4. HOW TO LIE DOWN Dr. Lyman Beecher said that one should always assume a horizontal posture in the middle of the day. The heart, he said, had less difficult work to pump the blood horizontally than vertically. Henry Ward Beecher attributed his power to do a great deal more work than ordinary men to this habit of his life of always resting in the middle of the day. He justified his habit by quoting from his father, using even his father's antique pronunciation of "poster." There is no doubt truth in this. To one very active and who performs a great deal of work it brings a variety of positions and greater rhythm. It rests the vital organs. It brings a harmonious repose and relation of parts. Even in lying down, we find abnormal conditions. Some men cramp and constrict themselves. The chest is allowed to collapse and the whole body tends to be drawn together. Grief or any negative emotion of feeling or condition destructive to health tends to act in this way.