The position of the bath in a house will depend upon the size of the bath and the house and its situation. In town houses, where the bath consists of only a washing and a hot room, the first floor will be the most convenient. Where a cooling room is provided, the ground floor is as handy as anywhere; and this position allows of the easier construction of the heating apparatus. In the country, the bath is best built away from the house, connected by a short lobby, which may be utilised for boots, &c., as at Fig. 24. The main difficulties to be overcome are the heating of the bath, and the non-conduction of heat to places where it is not wanted. The heating apparatus of a private bath may be, for the simplest, a common laundry stove, as at Fig. 22 (A) and at Fig. 23; for bigger baths, a small convoluted stove, as at Fig. 24; or a furnace of firebrick with an iron flue, as at B, Fig. 22--a plan of the hot room (15 ft. by 12 ft.) of the bath which Sir Erasmus Wilson built at Richmond Hill. For elaborate baths, a small furnace wholly constructed of fireclay, such as that of which I have given complete plans in the chapter on "Heating and Ventilation," would be the best. A furnace of this description is shown in the design for an elaborate private bath, at Fig. 25. Should the bath be heated regularly every day, a firebrick furnace is certainly the best, as such furnaces retain their heat a long time. It should be "banked" at night. A bath only required at times, and quickly, is best heated with a thin iron stove. A portable iron stove and a long length of iron flue will rapidly raise the temperature. The simple baths illustrated at Figs. 22 (A) and 23, are therefore very convenient and effective. The principle of heating by the transmission to the hot rooms of freshly-heated air is also a very convenient one for private purposes, as on this system the bath may be on an upper floor, and yet have its heating apparatus conveniently stowed away below, as at Fig. 24. A small furnace chamber, such as that at Fig. 6, _ante_, must be constructed, and a hot-air flue of large section built up to the hot room. If the bath be on the ground floor, the construction of any form of heating apparatus is rendered easier.