Cum venerint ad imum, non alte substruitur, ut sit libratum quam longissimum; hoc autem erit venter, quod Graeci appellant coelian.
and when it reaches the bottom, it is carried on a low substructure so that it may be levelled as far as possible. This will form a U-shaped bend which the Greeks call koilia.
final_alignments\Vitruvius_Architecture_Book_8.json