Qui cum exorto sole permanserunt, euri venti tenent partes, et ea re, quod ex auris procreatur, ab Graecis euros videtur esse appellatus, crastinusque dies propter auras matutinas aurion fertur esse vocitatus.
And when these have remained after sunrise, they hold the region of the east wind. Because this is generated from aurae (breezes) it seems to be called euros by the Greeks, and because of morning breezes the morrow is said to have been called aurion.
final_alignments\Vitruvius_Architecture_Book_1.json