As the boy grows to adolescence he tends to get further from the control of his parents. His growth implies change in him, and he may develop new needs and new desires without the power necessary to control them. It is well recognised that in adolescence there is a special liability to physical or mental breakdown, and short of this it is no uncommon thing for young people to show a degree of instability that alarms their friends for their safety. Yet in youth there are very many employed at occupations that are in a marked degree physically exhausting. They are permitted to take far too much out of their body, and though they may thereby develop their muscles, they are almost certain to hinder the healthy development of their minds. The State has interfered with some trades and prohibited certain processes of manufacture on the ground that the chemicals employed affect the health of the workers in an injurious way; and it has laid down regulations for the proper sanitation of workshops. It will yet have to consider the advisability of limiting the amount of physical energy that a man may be allowed regularly to expend in work, and the sooner it begins with lads the better for everybody. At present we hear of the large wage earned by workmen in certain trades and their notorious improvidence. To anyone with eyes to see their improvidence is not more evident in the way they spend their wages than in the way they earn them; for their lives, industrially, are short, and they are too often physical wrecks in middle life, partly from the undue fatigue to which they have been subjected and partly from vices they have contracted in the attempt to stimulate themselves when fatigued. We only hear of the vices, but their industry is equally foolish if it implies excessive expenditure of vitality; and no income in money would justify the cost at which it is obtained. Time and again there come before the courts young men who are neither insane nor weak-minded, but whose mental powers have been stunted and twisted by the conditions to which they have been subjected. They are not there for committing offences against property, but for startling the district by some atrocious assault; and there is this point of similarity about them all, that they have been engaged at work which was too heavy for them, and when set free from it have used the strength of a man incited by a man's passions to do things that only a boy would conceive.