For myself, I frankly confess that the longer I live the more I want to keep on doing so. Hence in the last two years of retired leisure I have given far more time and attention to personal hygiene, regimen, and diet than ever before and have mildly experimented with myself in many ways. I have tried eating two and four meals daily, going early and late to bed, forcing myself to lie there a fixed number of hours and at certain times again retiring and rising with no regularity as I felt like doing. I have tried systematic rub-downs, self-massage; cold and warm, frequent and infrequent baths, have equipped a modest gymnasium and taken mild but systematic exercises with various apparatus and then abandoned all this or done nothing of it without an inner prompting. I have followed prescribed diets and tried many special foods, interested myself in vitamines, beginning with Eddy’s manual and trying out vegex preparations, although no one has as yet studied the effects of any of the three species of vitamines upon old age, as has been done for other stages of life. I even used olive oil, which so many of my correspondents praise both for internal and external application, stopped smoking for a week, which seemed greatly to prolong each day after thirty years of mild addition to nicotine, corrected for a time and then yielded to the senescent’s tendency to constipation, experimented with alcohol in several forms, even with Pohl’s spermine tablets and minimal doses of phosphorus, etc. But out of all these moderate hygienic adventures I have so far found no topping specific. It would be interesting to try out the gland-grafting experiments which seem to have regenerated the famous Vienna surgeon, Lorenz, and others, and I think I would gladly offer myself as a _corpus vile_ for the Steinach operation to study its psychological effects at first hand. Although I have found in the above experiences a few things that I so far believe helpful to me, I have derived from them all no advice to offer others except, if time and inclination favor, to try out all things for themselves. Plenty of moderate exercise out of doors, active intellectual interests, both just to the point of healthy fatigue but no more, are fundamental. One must have insight and considerable power of self-observation to profit therefrom. But the main thing is to develop and maintain at its highest possible morale a rigorous and unremitting hygienic conscience that will never let down but always enforce the doing of what we know to be best. Otherwise we may eat, sleep, work, and generally do or not do what seems best as we list. I am even skeptical about the almost universal counsel for tranquillity and against worrying, for more or less anxiety is not only the normal lot of man but it gives a tonic sense of responsibility which we all need.