As to the temperature of the bath, that must, to a great extent, depend upon the conditions of life, and the predisposition and susceptibility of the individual; but the cold bath should always be employed in preference to the warm bath, when conditions permit. The cold bath is a powerful stimulant to the sympathetic nervous system. and as that is the great regulator of nutrition, the value of cold bathing to those afflicted with digestive disturbances will be readily understood, since all the digestive and assimilative processes are quickened by it. The glands of the stomach secrete more hydrochloric acid on account of this stimulus, and a better quality of gastric juice being thus formed, not only is the digestion improved, but the system is better enabled to resist microbic invasion. The cold bath also stimulates the vaso-motor system, which regulates the circulation, by contracting and dilating the vessels, and increases the activity of the capillaries or small blood vessels. It thus increases the resisting power of the skin, by enabling it to reheat the surface after a chill, and this is the reason why people who habitually use the cold bath are practically proof against "colds." People employed in sedentary occupations are especially benefited by the cold bath, but should employ a hot bath for three or four minutes beforehand. It is also especially beneficial to women, as, being an excellent nerve tonic, it successfully combats all forms of nervous weakness, and is an admirable preventive of hysteria. Children under seven years of age do not bear the application of cold water very well, and it is advisable not to use the water at a lower temperature than 700 Fahr., and to employ friction constantly while administering it; but after that age the temperature may be gradually lowered. In old age the neutral bath, from 75 to 850 Fahr. will be found the best for general use, accompanied by friction. The bath, to be thoroughly beneficial, should be taken at one of the three following portions of the day, immediately upon rising, about ten o'clock, or just before going to bed. The early morning bath is, however, immeasurably the best, and if cold, will be found a wonderful aid in promoting health and vigor, and being such a necessity, especially in the preservation of health, and the constant practice of it, strongly urged, we append the following useful suggestions for guidance: A full meal should not be taken in less than half an hour after bathing. Nor should a bath be taken in less than an hour and a half after eating a full meal. You can bathe with impunity in cold water when the body is perspiring freely, as long as the breathing is not disturbed, nor the body exhausted by over-exertion. Never bathe in cool or cold water when the body is cold. First restore warmth by exercise. Always wet the head before taking a plunge bath, and the chest also, if the lungs are weak.