The lavatorium and shampooing room now engage our attention. In elaborate baths they may, for the sake of effect, be distinct apartments, while, where strict economy must be studied, they may be comprised in one room; and where, again, space is extremely valuable, the plunge bath and douche may be also included. If the first arrangement be adopted, the shampooing room must be connected with the tepidarium, and the lavatorium placed next. Where the combination apartment is used, it will take the position of the shampooing room. Practically, the combination arrangement is the best. It is putting the bather to needless and undesirable trouble to require him to move from one apartment to another during the washing process. The suite of washing and shampooing rooms may be arranged in either one of the following ways, according to the pretensions and requirements of the establishment:--(1) A shampooing room, a lavatorium, a douche room, and a plunge bath chamber; (2) a combined shampooing and washing room, and a combined douche and plunge bath chamber; (3) several small combined shampooing and washing rooms, a douche room, and a plunge bath chamber; (4) an apartment comprising shampooing slabs, washing basins, douche, &c., and a plunge bath. A single shampooing room does not present a very complicated problem to the designer. The chief object to be borne in mind is that the shampooers require "elbow-room," and their patient in a convenient position to allow of their practising their art. As this is no light task--if properly performed--it becomes of urgent moment that the apartment should be no less perfectly ventilated than a sudorific chamber. In a vitiated atmosphere, no shampooer can work well for a prolonged period, and, moreover, pure air is as necessary for the bathers when in these places, as when they are in the hot rooms. The shampooing benches may be similar in description and size to those in the hot rooms. A width of 2 ft. is an ample provision, since the shampooer can more conveniently work with the bather as near him as possible. The benches may be constructed in a similar manner to those before described. They must be arranged on plan so that the shampooer has ample room, whilst at the same time space is not extravagantly wasted. The benches must be topped with white marble slabs. They may run round the wall, or be placed at right angles to them; or, again, if found more convenient, they may be altogether isolated. Similar means of ventilating the shampooing and washing rooms as the hot rooms must be provided. The vitiated air must be extracted at the floor level, as the temperature here must be maintained considerably above that of respired air. Movable wooden-framed marble-topped benches may be substituted for those of a permanent type; but the plan has nothing to recommend it except lowness of cost.