These active men usually have square faces. That is to say, there is a good development of the outer corners of the lower jaw, which gives to the face a square appearance. Oftentimes their cheek bones are both high and wide. As a general rule, they have large aquiline or Roman noses. When they are of the enduring type and capable of long-sustained muscular activity, they have prominent chins. Their hands are square. Their feet are large. If they have mechanical and constructive ability, as most of them have, their foreheads are comparatively high and wide just above the temple. Professional baseball players, professional dancers, middle-weight and light-weight prize-fighters, most aviators, automobile racers, and athletes belong to the wiry, springy, medium-sized type of this particular class of men. U.S. Grant, Robert E. Peary, Henry M. Stanley, Ty Cobb and Ralph DePalma belong to this type. Abraham Lincoln, W.E. Gladstone, Joseph G. Cannon, William G. McAdoo, Woodrow Wilson, and other men of this build belong to the raw-boned type. Napoleon Bonaparte, with his tremendous activities on only four hours' sleep a day, is a good example of the short, stocky type. While men of these types may make brilliant successes in purely mental vocations, as the result of the development of their intellects, and may keep themselves in a fair degree of health and strength by games, exercise, mountain climbing, farming, or some such avocation, they are, nevertheless, never quite so well satisfied as when they have something to do which not only gives them opportunity for the use of their intellects, but also involves a certain degree of physical activity as a part of their regular work. CHAPTER VII SLAVES OF MACHINERY To multitudes of men and women the lure of levers, cranks, wheels and pinions is as seductive, as insidious, as heavenly in its promises, and as hellish in its performances, as the opium habit. The craving for opium, however, is an acquired taste, while the passion for machinery is born in thousands. We have seen children, while yet in their baby-cabs, fascinated by automobiles, sewing machines, and even little mechanical toys. We knew a boy on a farm who built a fairly workable miniature threshing machine with his own hands before he was old enough to speak the name of it in anything but baby-talk. We have seen boys work in the broiling sun day after day hoeing potatoes, pulling weeds, gathering crops, and doing other hard jobs for small pay, carefully saving every penny to buy a toy steam engine. Parents usually look upon these evidences of mechanical ability with pleasure. They regard them as sure indications of the vocation of the child and oftentimes do everything in their power to encourage him in these lines. They little realize, however, the supreme danger which attaches to this very manifestation. Nor have they looked far enough ahead to see what is, in so many cases, the lamentable result. THE RESTLESS "MACHINE CRAZY" BOY