Some years ago there was devised a pretty iron crown, in three parts, which has been much used for this purpose. The first part, which rests upon the head, weighed nine pounds; when an iron ring was placed inside of this, it weighed eighteen pounds, and when the second one was added, the weight was twenty-seven pounds. This device was ornamental and convenient. But, while the crown is the best thing; any weight will do. A bag of corn or beans may be employed, A book will answer very well. I have frequently seen books used. You can use any large book of no value,--say a large law book,--and you will find that the effort to retain it on the head will secure a perfectly balanced, accurate movement of all the muscles of the body. Whatever weight is employed, let it be carried upon the top of the head, holding the chin close to the neck, thirty minutes in the morning, and about the same time before lying down at night. In this connection let me say that the use of thick pillows tends to produce a curve in the neck. The pillows should be hard and thin. I am glad to see that hair pillows of moderate size are being generally introduced. Let me explain the way in which carrying a load upon the head helps the spine into an erect posture. The spine is composed of twenty- four separate bones, which do not lie upon one another, but are separated by cushions of elastic cartilage. Suppose the thickness of these cushions to be a quarter of an inch. When the spine is erect, they are of the same thickness all around. When the spine is bent sidewise, say towards the right, the elastic cushions become thinner on that side, and if the bending is decided, the edges of the spinal bones themselves will nearly touch, while the mass of elastic or india-rubber substance will be pressed over to the left side. Now suppose that one follows an occupation requiring this position of the spine. After a time, unless pains are taken to counterbalance the mischievous influence of the occupation, these india-rubber cushions between the spinal bones will become fixed in this wedge- like shape, being thin on the right side and thick on the left side. Now suppose, instead of bending sidewise, one bends forward, as nine persons in ten do, exactly the same thing takes place in these elastic, rubber cushions, only that the rubber is pushed backward, and the spine bones come together in front. When the chin is drawn back close to the neck, and the cushions are brought into their natural equality of thickness all around, if, at the same moment, a considerable weight is placed upon the head to press hard upon the spinal cushions, much will be done in a little time, to fix them in this natural shape. It requires but a few months of this management to induce a very striking change in the attitude of the spine.