Eadem ratione vox ita ad circinum efficit motiones; sed in aqua circuli planitiae in latitudine moventur, vox et in latitudine progreditur et altitudinem gradatim scandit.
In the same way the voice in like manner moves circle fashion. But while in water the circles move horizontally only, the voice both moves horizontally and rises vertically by stages.
final_alignments\Vitruvius_Architecture_Book_5.json