Fig. 180.—Bath-tub with side oven.
Fig. 181.—Bath-tub with inside flue.
There are many forms of bathing-tubs, all of them being large and deep. Means for applying the heat direct, which is of course the most economical, is attained in various ways. In the common form ([fig. 180]), a small chamber of copper is introduced at one end near the bottom of the tub,—the mouth having a frame of stone, or of clay or plaster. In this chamber a fire is built, and the water can be brought, if necessary, to the boiling-point. Within the tub a few transverse bars prevent the bather from coming in contact with the hot chamber in which the fire is burning. In another form a copper funnel or tube passes directly through the bottom of the bathing-tub ([fig. 181]). The bottom of this tube has a grating of wire; charcoal is then placed in the tube, and its combustion rapidly heats the water. A pan is placed below [pg 204] the tube to catch the coal and ashes that fall through. In a more elaborate form ([fig. 182]), the bath-tub is in two sections, separated by the partition of the room. These two sections are connected by a number of bamboo tubes or flues, so that the water may circulate freely. The section outside contains the fire-box, in which the fire is built; by this arrangement the bather escapes the discomfort of the smoke from the fire.
Fig. 182.—Bath-tub in section, with oven outside the room.