Non minus sonus vocis in generibus gentium dispares et varias habet qualitates, ideo quod terminatio orientis et occidentis circa terrae librationem, qua dividitur pars superior et inferior mundi, habere videtur libratam naturali modo circumitionem, quam etiam mathematici orizonta dicunt.
In like manner the sound of the voice has varied qualities which differ with different races. And the reason is that the limits between east and west around the level of the earth (where the upper and lower part of the world is divided) seem to have the circumference naturally levelled, and this the astronomers name the horizon.
final_alignments\Vitruvius_Architecture_Book_6.json