The son of a family in England, who are great friends of mine, has formed a resolution not to sleep any longer in the comfortable family mansion, but in a tent in the meadows of his property during both winter and summer. His family and friends regarded this as an eccentricity, against which they warned him; but still he got on very well in his tent, and looks fresher and healthier than ever before. We are always put down as eccentric if we have the courage to resist the foolish prejudices of our surroundings. For my part I prefer to live to be 100, and to attain this I do not object to be considered “eccentric.” Anyone who is anxious to live long and preserve his youth should endeavor to spend as much time as possible in the open air. After the day’s work is finished we should always get out into the air, preferably in a park or wood adjacent to our home, where there is more oxygen contained in the air. We should follow the example of those English people who leave town on Saturday and remain in the country until Monday, leaving behind them the cares of business. There is probably no nation which likes exercise in the open air so much as the English, Scotch, and Irish, and among them is to be found the greatest longevity. An agreeable way to get plenty of fresh air is by automobiling, and for those whose means can afford it long journeys by automobile may constitute an excellent fresh air cure, as they tend to improve the appetite, produce sleep, and relieve neurasthenic conditions in general. But automobiling can only be considered as a hygienic means for longevity when the speed does not exceed twenty to twenty-five miles an hour. When in the country we should always prefer mountains, and the higher they are the purer is the air and the more oxygen does it contain, as a rule. At the same time very much depends also on the presence of forests, especially of pines and fir trees. High mountains with such arborization generally have pure fresh air full of oxygen, and there is no drug in pharmacy that can equal this in its beneficial effects. It is a fact, established by leading physiologists, that persons living on mountains have more red blood-corpuscles than those living in the plains. When patients are sent to spots so elevated in the air as mountains with forests, we find them, as a rule, looking healthy and fresh when they return from their holiday in the fresh air.