What is a Turkish bath? Should this question be asked by any of our readers, we would answer, that it is a bath differing from all other hot baths in this important particular, viz., that the heated medium is AIR instead of water; and that all parts of the body, when in the bath, are subjected to an even and equal temperature. The result of which is, that inasmuch as man was constituted to breathe AIR instead of vapour, the Turkish bath may be enjoyed for hours at a time, without inconvenience; whereas in the vapour-bath the patient is unable to remain in it for more than about a quarter of an hour, in consequence of a feeling of suffocation, from want of a sufficient supply of air to the lungs. And further, there is this difference between the two baths, that in the case both of the vapour-bath and the vapour-box [22] the pulse is materially raised, whilst in the Turkish bath the pulse seldom rises above its normal state, which shows that the circulation is very little affected by it—an all-important fact, which is thus accounted for:—The normal temperature of the human body, when in a state of health, is about 98° Faht., a temperature which cannot be much augmented or diminished without producing injurious results in the system; but as it is impossible always to maintain so low temperature about us, Nature has provided, by means of perspiration, a safety valve, by which the human body is protected from the evil consequences which would arise from its exposure to a high temperature—the principle on which she acts being as follows:—It is a physical law that whenever evaporation takes place a considerable amount of latent heat, (i.e. heat not sensible to the thermometer), is absorbed, by which abstraction of heat the temperature of the body from which the evaporation proceeds is greatly lowered; but as evaporation consists in the absorption of vapour by the surrounding air, it is evident that no evaporation can take place where that air is already saturated with moisture, and it is also evident that the amount of evaporation will depend on the dryness of that air. Accordingly, in the Turkish bath, the air being almost dry, when perspiration takes place it is followed by a rapid evaporation which cools the body, and prevents its temperature from rising above a healthful limit; whereas, in the vapour-bath and vapour-box, the air being saturated, with moisture, evaporation cannot take place, and consequently as no means for reducing the high temperature of the body exist, the heat is thrown in upon the system, raising the pulse, producing feverish headache, and other symptoms of a highly deranged circulation; whilst a further derangement arises from an insufficient supply of air to the surface of the body. In the Turkish bath, again, the system, feeling that it has an ample supply of air, is not called upon to quicken the circulation through the lungs in order to obtain an increased supply, and thus