The kind of place one chooses for her vacation will depend on where her home is. To dwellers in cities, the mountains and seaside resorts are the most beneficial. August is our most trying month, and every one who can would do well to take her vacation at that time, always selecting some resort north of her own home, so that she may have the additional advantage of a more bracing climate. Maine furnishes many of the most beneficial of our health resorts, combining as it does so many attractions—its bracing atmosphere of pine forests, its beautiful scenery with vast expanses of water, and the great variety of diversions which it affords. It is always wise to send an advance scout to investigate the place in which you contemplate spending your vacation. Avoid low and swampy land; investigate the character of the water-supply and the nature of the plumbing, together with the sewerage system, for it is all too frequent that an attack of typhoid fever follows an outing in the country. Every good summer resort should furnish facilities for a variety of outdoor sports—golf, tennis, boating, swimming, etc. During the vacation needless exposure to the direct rays of the sun must be avoided. There is probably nothing which lowers the vital resistance, and so prepares the way for disease as much as exhausting exposure to the hot rays of the sun. Long hours of sleep should be indulged in. The morning air is the most beneficial; it is, therefore, a good habit to retire early and to rise early. If the vacation is not properly spent, it may be the means of doing more harm than good. On the other hand, if properly spent, vacations prepare one as nothing else can to meet and resist the vicissitudes of the following winter. It is the people who go off on long vacations who have the least need of the doctor’s care. =Sleep.=—During sleep all the bodily functions are in abeyance and the secretions are diminished; respiration is slow and confined to the chest, so that the amount of inspired air is only one-seventh of that during the waking hours; the temperature of the body falls; less blood circulates through the brain; and the sensibility of the nerves to external stimuli is diminished. Sleep is not only _par excellence_ the time of repose and recuperation of the brain and nerve substance, but it is the only time when, by the diminution of waste caused by the incessant activity of the brain, that the organ can be properly nourished, the deficit in nerve force canceled, and the surplus of energy stored up. Without this absolute remission of brain activity every twenty-four hours an actual destruction of substance would occur, which, if persisted in, would be so depressing to the nervous functions as to be inconsistent with life, and this is the case in the concluding stages of fatal diseases.