What, therefore, is to be recommended in the prophylaxis of the natural deterioration of the wells of life, the ductless glands? For even if we may be able to replenish them when they dry up, would it not be better to delay their dessication? The hormones reply to every call of life and respond in every reaction. The normal constructive process of their cells remanufactures what has been lost, and the original capacity to respond is restored. If, though, the rate of destruction and loss outruns the rate of repair and construction, they will be permanently damaged. This is what occurs in shock, serious, severe accidents and injuries, prolonged infections and diseases, profound continued emotions, and the wear and tear of overwork. The prevention of these excessive fatigues of the endocrine system in one or all of its parts, and especially the prevention and enfeeblement of the diseases of children which injure them at a period when they are most sensitive to injury, is the task of the endocrine hygienist. Periodic examinations, to check up the balance sheets of the hormone factories and to measure the amount of their damage by means of blood analyses, will provide the most valuable method in the campaign to lengthen the productive and enjoying span of life. THE TREATMENT OF CRIME Endocrine hygiene will discover no wider or more fruitful area for exploration and control than that of crime. For more than a generation there have been attempts at a criminology, and a new understanding and control of crime. In the United States a concomitant sentimentalism has concocted measures like the honor system which, naturally failing of their purpose, have undermined confidence in the idea of scientific diagnosis and treatment of crime. As someone has noted, to ask a criminal to promise not to misbehave, when discharged from prison, is like asking a typhoid fever patient to promise not to have a temperature above ninety-nine degrees the next morning. For a large proportion of criminals--the percentage has yet to be determined, although the most recent police commissioner of Chicago has estimated it at ninety per cent--punishment for a period of time and then letting him go free is like imprisoning a diphtheria carrier for a while and then permitting him to commingle with his fellows and spread the germ of diphtheria. Of course, the doctrine of responsibility is all tangled up with our attitude towards and treatment of crime. Though clear thought makes mandatory the recognition of a universal cause and effect law, practical common sense has defined free will. Consent or the withholding of consent to a given course of action has been the criterion of responsibility.