hind legs? Even when they do not place their feet on a convenient table they are prone to tip the chair back and partly balance it on the hind legs. Why do people instinctively prefer a rocking chair as a source of comfort, even when they do not rock? The fact is that it is not the rocking that makes a rocking chair comfortable, but the position of the seat of the chair, with its downward slope toward the back. The rocking chair is comfortable for just the same reason that the ordinary dining chair is made more comfortable when a man tilts it back upon its hind legs. The reason is that in this position one does not tend to slide forward off the chair, the weight of the body naturally carrying the hips to the back of the chair, where it is supported naturally. In order to avoid the "sliding down the cellar door" character of the conventional chair a change should be made in the incline of the seat similar to that found in the ordinary rocking chair and in the chair when tipped back in the manner I have described.

The photograph which has been reproduced on the preceding page illustrates the point I wish to make. In this particular instance I have used an ordinary chair to show what can be done to improve the chairs in the ordinary home. Both of the back legs of this chair were sawed off some three or four inches-thus elevating the front part of the chair and lowering the back part, giving the seat an incline toward the rear which more comfortably accommodates the body. This position approximates that of the ordinary swivel desk chair tilted back by business men when they are not leaning forward over their desks. This suggestion can be adopted very easily and cheaply in almost any home, for any ordinary chair treated in this manner will be very greatly improved, and far greater comfort will be experienced as a result of the change. Civilized men and women spend such a very large part of the time in a sitting position that the bodily posture when sitting down is a very great factor in the bodily welfare and health. Special thought and study, therefore, should be given the question of the sitting posture. Unfortunately, this particular subject seems to have been ignored absolutely for hundreds of years in the making of our chairs.

It is just as harmful to sit all humped over as it is to stand in such a position. The nervous system cannot be maintained at its best unless the spine is held reasonably erect. Whether sitting or standing, therefore, it is important that you should make a never-ending struggle for a straight spine.

If the back of the chair in which you sit is not properly made then it is better, in most cases, to ignore the back altogether. Sit slightly forward from the back and maintain an erect position, with the chin held in, downward and backward. In this position you should sit well balanced, as it were. The chest should occupy the same relative position as when standing erect. If you will hold the head in the position I have indicated it will help you to keep the chest and back in the right position. As a general thing, it is a much more simple matter to maintain this erect position when sitting, if either one foot, or both feet, are drawn back under the chair. When both feet are stretched out forward upon the floor a person is inclined to sag backward in a partially reclining position upon the chair. By holding one foot underneath the chair in such a manner that you could rise to a standing position, if desired, without lurching forward, you will find it easy to maintain a well balanced and erect posture. If at any time you find yourself slumping forward or slouching in your seat, it is good to stretch your arms high above the head, or to expand the chest and draw your shoulders backward in the position commonly assumed when yawning and stretching. Either of these stretching movements will give you an erect position, and you can maintain this thereafter by keeping the head in the right position-chin inward, downward and backward. These stretching movements will be equally effective for improving the carriage when standing.

The same complaint that I have made against the ordinary chair can be registered with special force against the desks used in the schoolrooms. There is no question that a great deal of spinal curvature in childhood, to say nothing of round shoulders and flat chests, are directly the result of the improper sitting posture in the schools which is enforced upon the children because of the unsuitable character of their seating arrangements. Thus we practically begin life hampered by an unsatisfactory environment, so far as our sitting posture is concerned.

The chair back or the desk chair should fit the human back. It. should favor and not hamper one in assuming a normal and straight position of the spine.

When you get up in the morning, exercise yourself a little in straightening the spine, chin in, downward and backward. When you walk to business or when you go about your duties, keep the same thought in mind. Force the head back. Take the exercises which you will find in the next chapter, referring to the thyroid gland, at very frequent intervals during the day.

Remember that in fighting for a straight spine you are fighting for youth and health and life and energy and courage and enthusiasm. You are fighting for everything that is best in life, and you should strive and struggle with all the energy you possess to win the rewards associated therewith.

Each day of your life will bring difficulties, worries. Life at its best is not a bed of roses. All these various influences are inclined to make you hang your head. You may have moments when you are hopeless, when life seems forbidding and cheerless. Fight against such inclinations with all the power you possess. Struggle against such discouragements with all your might and main, not only through your mental attitude but through your determination to maintain an erect spine. Hold your head up and look the world in the face.

Don't shirk your duty. Don't deviate from the path along which your best impulses and highest ideals would lead you. Life is worth while. It is filled with glorious opportunities. Reach out and grasp them as they come up. Hold your head up and be a man or a woman to the fullest extent of your abilities.

CHAPTER IV: Stimulating the Source of Stamina and Vitality

This is an age of short cuts. Any devious routes to the accomplishment of an object should be avoided. If you want vitality, and the vivacity, energy and enthusiasm with which it is associated, you naturally search for a method which will bring certain and quick improvements. The reasonableness and general prevalence of this demand was in my mind when I began experimentation with a view to discovering a method for stimulating what I term the source of vital power.

Scientific men while delving into the marvelous secrets of physiology, have learned that the thyroid gland in some peculiar manner possesses an extraordinary influence upon vital stamina and virility. This mysterious gland is located in front of the neck, about half way between the so-called "Adam's apple" and the top of the sternum or breast-bone, where it adheres to each side of the front of the trachea, or windpipe, in a flattened form, something like the wings of a butterfly, with a connecting "isthmus." It is a "ductless" gland, its secretions apparently being taken up by absorption into the lymph, and from that into the blood.

While the functions of this little organ are not yet very clearly understood, there is nothing more definitely known than its tremendous importance in the bodily economy. Without it there can be no such thing as healthy development. Thyroid deficiency in children gives rise to a form of idiocy, bodily malformation and degeneracy known as cretinism, while in adult life it is associated with a similar disorder known as myxedema. Goiter is the most