... Fig. 6, with inclined flues. As a rule, it is more economical, in heating on the principle now under consideration, to place the furnace below the level of the hot rooms; but if desirable to place both on one level, the back wall of the furnace chamber becomes the party wall of the laconicum, and it must be stopped short of the ceiling, and the ... — The Turkish Bath - Its Design and Construction • Robert Owen Allsop