Perspiration having been induced, the bather submits to the kneading of the muscles of the trunk and limbs by the shampooer. For this operation, which restores tone and vigour to the muscular and nervous system, a separate and distinct apartment should, in high class baths, be provided. Vigorous friction with a coarse glove succeeds the shampooing. This detaches the dead portions of the epidermis, and is an operation generally practised in the _Lavatorium_--a washing room adjoining the shampooing room. In the same place the bather receives copious ablutions with warm water. The less robust conclude the cleansing process with a douche, needle, spray, or shower bath, graduated from warm to cold; and the strong bather, by plunging into a bath of cold water, the object of which is to contract and close the sweat-glands and pores of the skin that have been swelled and opened by the high temperatures of the calorific apartments. For these purposes a small room, with the various appliances named, and a large chamber containing a more or less ample plunge bath, must be provided. In small baths, provision for both these operations is made in one general shampooing and washing room, where the bather is "massed," rubbed down, washed, and takes the plunge or shower bath. The plunge may, if thought advantageous, be placed partly in the cool apartment and partly in the hot rooms, in which case, the bather dives under a glazed partition of some sort, which, furnished with an india-rubber flap dangling in the water, prevents the hot air of the sudatorium from entering the cooling rooms. The above description gives an outline of the cleansing and hygienic processes, and of the nature of the requirements of those portions of the bath devoted to their attainment. I have named them first as being the most indispensable portion of the necessary suite of rooms, since the bath may exist if it be merely in the form of an old Irish "sweating-house," or a somewhat similar construction of the North American Indian; but without the heated chamber and its appurtenances there can be no bath. The next important features to be considered are the dressing and cooling rooms. Before entering the bath rooms proper, the bather must divest himself of his clothing, and assume the bathing garment. The dressing room or _Apodyterium_, and the cooling room or _Frigidarium_, are generally made one and the same; but they may, with advantage, be designed as separate and distinct apartments, the provision for dressing and undressing consisting of a room or rooms with small dressing-boxes around it. The frigidarium will then be a simple apartment designed for the economical reception of the reposing couches, it being absolutely essential that the bather rest awhile, after the bath, to allow the body to gradually assume its normal temperature. Neglect of this precaution may cause a renewal of perspiration, and possibly a "cold."