Suspensurae caldariorum ita sunt faciendae, ut primum sesquipedalibus tegulis solum sternatur inclinatum ad hypocausim, uti pila cum mittatur, non possit intro resistere, sed rursus redeat ad praefurnium ipsa per se; ita flamma facilius pervagabitur sub suspensione.
The vaulted chambers which contain the basins, are to be heated from the common furnace. The hanging floors of the hot baths are to be made as follows: first the ground is to be paved with eighteen inch tiles sloping towards the furnace, so that when a ball is thrown in it does not rest within, but comes back to the furnace room of itself. Thus the flame will more easily spread under the floor.
final_alignments\Vitruvius_Architecture_Book_5.json