There are three features of the bath that are fit subjects for handsome designing, and they are the frigidarium, the tepidarium, and the plunge bath. There is an excuse for elaborating the first two, in that these are the apartments in which the bather remains the longest time; and as for the plunge, it is in itself an object capable of giving a very pleasing effect. Over-elaboration--in respect to added ornament--in the hot rooms, however, gives an air of incongruity. Simplicity, with good proportions, seems here the most pleasing. The general effect of the hot rooms should be light, a statement which is wholly in harmony with what I have said on their lighting, though it may not at first sight appear to be so. The tone of the ceilings and walls and floors should be light, the darkest portions being a dado. A generally dark and heavy tone of colouring is very oppressive in a sudatory chamber. Keep them light: light ceilings of plaster for cheap baths, and of lightly decorated, large, thin tiles, or lightly-tinted enamelled iron, for more expensive establishments; light walls of white, ivory, cream, or buff glazed bricks, without startling bands of a vulgar, as distinct from a really bold, contrast; and mosaic floors of a light filling-in and not too dark pattern. The risers to marble-topped benches may be of another tone, but not too dark; and, in place of a dado of bare glazed bricks, it is perhaps best to stretch Indian matting to keep the bather from the burning wall, as at Fig. 20. This will necessitate fillets affixed to plugs in the brickwork. Woodwork looks best dark and polished, affording an agreeable contrast to the lighter materials. Bright points of colour may be obtained by stained glass in ceiling-lights or windows, and at night by coloured glass shades over lamps, &c. The use of iron joists with glazed brick arches between is not to be recommended for the ceilings of the hot rooms. To say the least, it is a heavy-looking arrangement. Enamelled iron may be made to look very well if affixed in sheets of delicate tint with light patterns, and affixed with "buttons" with enamelled heads to the fireproof floors, as at Fig. 18. Large thin tiles make an admirable ceiling for small baths. They may be fixed with ornamental wood fillets, or made with screw-holes and affixed to ceiling joists. [Illustration: FIG. 18. Section and Plan of an Enamelled Iron Ceiling.] Glazed brickwork for the walls of hot rooms, &c., should be specified to be executed with an extra neat joint, and should bond to less than 12 in. to the foot; otherwise the effect of the unwieldy mortar joints is clumsy. This applies equally to walling and to arches and vaults. Work which may pass as fair in ordinary cases, looks coarse and rough in the glazed interior walls of a bath. In selecting glazed bricks there is some difficulty in obtaining really delicate tints; much of the work produced is unfortunately of a very crude colouring.