No admixture of vegetable fibre should be admitted, and the practice of wearing a woollen shirt under a cotton or linen one, Dr. Jaeger considers enervating and weakening. Clothing should fit quite tightly to the skin, so as to allow of the least possible movement of air between it and the body; the second great rule being that it should be twice as thick along the middle line of the trunk, from the neck downwards, as at the sides or back. Another point for consideration is the number of garments to be worn one over the other. On this question Dr. Jaeger is of opinion that the clothing for men and boys should simply consist of a woollen shirt, woollen socks or stockings, cloth trousers fitting as closely as may be, and a cloth coat. The coat sleeves and linings should be of woollen, and these, as well as the trouser legs, when the latter do not fit tightly, must be closed against upward draughts by webbings sewn into them, and fitting tightly round the arms and ankles. No drawers are required, no waistcoat, and no overcoat; not even in the winter time, except when driving. Men’s coats must fit tightly up to the neck, and compactly to the figure, and all others must be laid aside as unsanitary. The coat must also be double-breasted, and like all the rest of the materials recommended, must be undyed, of the natural color, or treated with uninjurious fast dyes. The same rule applies to the trousers, which must fasten so as to continue the middle line of extra warmth. This rule has special application to those who desire to melt away superfluous fat, or those who are subject to disorders of the stomach or digestive organs. The feet are to be covered with woollen socks, with a special division for each toe; or else one for the great toe, while the upper part of the boot must be of felt, and the lower part of felt or porous leather; the boot being kept thoroughly porous, so that the feet may be as cleanly and pure as the hands. The usual starched linen collar is substituted by one made of unstiffened white cashmere, or one of the wool in its natural hue. These collars can be obtained in every shape and style, stand up and turn-downs, and they are considered as the most comfortable that could possibly be devised, as well as preventions of throat disorders. The hat should be of felt, and no linings of leather nor linen are admissible. Instead of these a strip of felt should be used, or else the hat should be quite without lining, like a Turkish fez. The shellac used in stiffening hats is said to have an injurious effect, and those who are bald or threatened with baldness, or those who suffer from headaches, are especially advised to try the unstiffened sanitary hat and its woollen lining.