Page:Popular Science Monthly Volume 92.djvu/39

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Is Your Brain Completely Furnished?

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As a man thinketh— so is he." This illustration shows how all movements and functions of the body are controlled from the head. The brain conducts a busy telephone exchange, with a central office and many branches. Whether you want to walk or to sneeze to sit up, or just go on breathing, the order must come from the man higher up." Then, over the wires go instructions to the hands, legs or lung bellows. There is an independent switchboard which governs so-called involuntary action. You can easily locate the memory files, the picture show, and the ventilator. But can you find love or hate, fear or joy anywhere about the premises? Where, oh where is fancy bred? In the heart, or in the head?"

(From a drawing by Prof, and Mrs. Winfield Scott Hall in Pictured Knowledge.Compton-Johnson Co.)

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