Vitality Supreme

These very pleasing results induced me to go more carefully into the causes underlying this remarkable improvement. I carried on an elaborate series of careful experiments with a view to proving the conclusions to which I had come in the course of these exercises. It was quite apparent that a full development of the back part of the upper spine was necessary in order to maintain the strength essential to extreme vigor and vitality. And it became quite plain to me that this development could not be achieved without stimulating to an unusual degree the thyroid gland. Reasoning along this line, I called to mind the appearance of various animals noted for their great strength and there I found my conclusions verified with remarkable emphasis. The arched neck of the stallion, the huge development of the back of the neck of the domestic bull, the same character in even more pronounced form in the case of the bull buffalo and the musk-ox, and in varying degrees in other animals conspicuous for their vitality and energy-all this seemed to indicate that I was on the verge of a remarkable discovery. When you think of a fiery steed, in every instance you bring to mind the arched appearance of the neck. The tight reins that are sometimes used to give a horse a pleasing appearance, are based upon the same ideal, showing a more or less subconscious recognition of the idea that this particular development is associated with tremendous animal vigor.