Whenever he fancied he had taken cold, he would go, at about nine o'clock in the evening, in such diminished clothing as would render him in a very little time, quite chilly, and remain out of doors, when the weather would possibly permit, till he was almost frozen, and then come in and go immediately to bed, and procure a reaction. This he called freezing out his colds. Whether it was the cold or the heat that restored him, may be a point not yet fully settled; but it was a well-known fact to his friends, though they insisted in protesting against the practice, that every vestige of his cold would frequently, if not always, immediately disappear. But it was a method of treatment which, as the event proved, was not without its hazards. I met with him a few years since, and on inquiring whether he continued to be as successful as formerly in freezing out his colds, he replied that for some time past he had not tried the plan, for, on a former occasion, after many successful experiments, he had failed in one, and had concluded to relinquish it. He made no farther confessions for himself, but his friends have since told me that in the case he faintly alluded to, he came very near dying under the process. He was sick with a fever, as the consequence, for a long time. A man in one of the Middle States, who is himself about half a physician, and who has in various ways done much for his fellow-men as a philanthropist, is accustomed to pursue a course of treatment which, though slightly related to the former, is, nevertheless, founded on principle. He keeps the sick in a room whose temperature is very low,--little, if at all, above the freezing point,--in order that they may inhale a full supply of oxygen. For every one doubtless knows that the colder the air, the denser it is, and consequently, the greater the absolute quantity of oxygen inhaled at each breath. By compelling his patients, however weak and feeble, to breathe a cold atmosphere, he secured to them an increased and full supply of oxygen. To prevent his patients from suffering, in consequence of the external atmospheric cold, he keeps them in warm beds, and only suffers them to be out of bed a very short time, at long intervals. And while out of bed even, they are rubbed rapidly, in order to prevent any collapse of the skin from the cold. I knew him to keep a very delicate female, who was scrofulous if not consumptive, for several weeks of the coldest part of the winter, in a room whose temperature seldom exceeded 30° to 40°, scarcely permitting her to go out of it night or day, and what is still more curious, she slowly recovered under the treatment, and is now--seven or eight years afterwards--in the enjoyment of excellent health. CHAPTER LXXI. THE AIR-CURE.