The embryo body is a compound physical structure built of cells, as a house is built of bricks. The atoms and cells, of which it is composed, are subject to all the laws of force and motion, to the same extent, and in the same manner that bricks are. Nor have they any more intellect, memory nor will-power than a brick has. Perhaps the first thing that an infant does, after birth, is to breathe. In order to do this, air must be forced into, and out of its lungs. To enable the heart to beat, its auricles must dilate and take the blood into it; and its ventricles must contract and force the blood out of it, and into the arteries. So that every time one breathes, and every time one’s heart beats, force is exerted and motion of air and blood is produced. Every time one takes a drink of water or a bite of bread he must exert sufficient force to raise it, and produce sufficient motion to bring it to his mouth. Every time one takes a step he exerts sufficient force and produces sufficient motion to move his body the distance that he steps. For example, suppose that A, weighing two hundred pounds, gets on an electric street car and rides a mile. It is obvious that the electric motor has exerted sufficient force and produced sufficient motion of A’s body to move two hundred pounds, the distance of a mile. Now, if A had walked along the same railway track the same distance, it is clear that he would have exerted the same force and produced the same motion of his body that the motor did. We eat, drink, speak, move, act, work, live--do everything by force and motion. When they cease, death comes. Everything that a man can do with a physical body is resolvable into force and motion. He may move a body from one place to another; he may group two or more bodies together; or he may take two or more bodies apart; or he may cut or break a body into two or more parts. But, at last, all of these operations are equivalent to moving one or more bodies from one place to another, by force and motion. A sewing machine, adding machine, watch, steam engine, and every other machine is constructed by force and motion. Every piece of music is sung or played by force and motion. Every painting is made by grouping two or more pigments (colors) together in a particular manner by force and motion.