Nullae enim camerae, quae sunt caldariorum, supra se possunt habere fontes, sed caelum, quod est ibi ex praefurniis ab ignis vapore percalefactum, corripit ex pavimentis aquam et aufert secum in camararum curvaturas et sustinet, ideo quod semper vapor calidus in altitudinem se trudit.
For the vaulted chambers which enclose a hot bath cannot have springs above them, but the ceiling which is there heated with hot air from the furnace, takes up water from the pavement, and carrying it up to the curved surface of the vaulting, supports it, because warm vapour always thrusts upward.
final_alignments\Vitruvius_Architecture_Book_8.json