Hoc autem ita esse ex eo licet animadvertere, quod, sub tectis cum sint aquarum fontes aut etiam sub terra palustris abundantia, ex his nullus surgit umor nebulosus, sed in apertis hypaethrisque locis, cum sol oriens vapore tangat mundum, ex umidis et abundantius excitat umores et exconglobatos in altitudinem tollit.
We can perceive that this is so from the fact that when springs of water are under cover, or there is underground a marshy flow, no moist vapour rises. In places open to the air and sky, when the rising sun touches the world with its warmth, it draws the moisture from moist sites even more abundantly, gathers it together and raises it above.
final_alignments\Vitruvius_Architecture_Book_5.json