Premising an ample supply of pure water, it must be brought into the building through a water-meter to the cold water cistern, which should be at a sufficiently high level to obtain a good "head." This cistern must be capacious and properly connected, on the ordinary circulating principle, with a hot water tank and boiler. Of suitable boilers there are several in the market, of many and varied designs. Simplicity of construction should be the guide to a selection. The boiler will perhaps its most conveniently placed in the stokery, and have be separate furnace and flue, any scheme for combining the heating of the hot rooms and of the water being out of the question. In small baths, however, the hot-water tank may, for economy's sake, be placed near the ceiling in the laconicum. Where waste steam can be obtained, a water super-heater, with steam coil, may be employed with advantage; but in the majority of cases the ordinary circulating system will be found the most suitable. The supply-pipes must be of large section, and indeed, the whole scheme of water-fitting should be liberal. It must be remembered that, in addition to the wants of the lavatorium and douche room, plunge, &c., there will be a large amount of water required for laundry purposes, if washing be done upon the premises. The cold supply cistern may, by the exigencies of the case, be kept down as low as the ceiling of the bath-rooms, and be placed over some subsidiary apartment. This does not give much pressure of water. For all purposes it is best to have the cistern at a minimum height of about 20 ft. above the draw-off taps and valves of the various bathing appliances. This will ensure a good head of water, and make the douche a formidable affair. The pipes, unions, tees, valves, and cocks should all be of the best description in so important a work as the fitting-up of a public bath. Ordinary bungling plumbing is here out of place. Lead piping should be discarded for all but very cheap work, and iron employed in its stead, with proper screwed joints, angles, and tees. Should there be sufficient means, _copper_ piping should be employed for anything under 1 in. internal diameter, and gunmetal should be used for unions, &c., and for cocks and valves. Handsome, large, and well-made water-fittings conduce, in no small degree, to the effect of a bath. There should be no attempt at hiding away of pipes, &c. They should be made features of the bath, and be designed with care and neatly finished. Every pipe, joint, and connection should be prearranged, and the means of fixing and supporting the same carefully designed. Boxings, and the like, should be discarded, and everything frankly exhibited. The day for mysterious plumbing has gone by. There is some beauty even in a pipe.