Et primum oculorum, quod ex viridibus subtilis et extenuatus aer propter motionem corporis influens perlimat speciem et ita auferens ex oculis umorem crassum, aciem tenuem et acutam speciem relinquit; praeterea, cum corpus motionibus in ambulatione calescat, umores ex membris aer exsugendo inminuit plenitates extenuatque dissipando quod plus inest quam corpus potest sustinere.
first for the eyes, because from the green plantations, the air being subtle and rarefied, flows into the body as it moves, clears the vision, and so by removing the thick humour from the eyes, leaves the glance defined and the image clearly marked. Moreover, since in walking the body is heated by motion, the air extracts the humours from the limbs, and diminishes repletion, by dissipating what the body has, more than it can carry.
final_alignments\Vitruvius_Architecture_Book_5.json