The interest of society in private industry is one of the chief reasons for the establishment and maintenance of free public education. Clearly, children as well as their parents have the correct notion that school attendance increases the chances for higher individual incomes in after life. Almost all college students, and, it is safe to say, a majority of high school pupils, particularly boys, frankly admit, when questioned on the subject, that they attend school primarily to prepare themselves for better-paying places in the industrial world than they otherwise could expect to get. They are encouraged to take this view by educators and teachers who dwell on the fact that each day a boy spends in high school or college adds ten dollars or more to his income in after life. The desire to increase one's earning power is laudable enough, but may we not properly ask: Can the expenditure of public money be justified, from an economic point of view, on the ground that it will assist individuals to increase their own incomes? The answer involves the two aspects of industry - individual and social. Society appeals directly to the narrow motives of the individual, we may say - not improperly - to his selfishness. It gives him, at public expense, the opportunity to prepare himself to earn more than would otherwise be possible, knowing full well that in the long run he will normally return to society, through increased production, not only the cost of his training and education, but also something in addition.