Tunc ex novem partibus et dimidia una pars et dimidia abaci crassitudo relinquatur, reliquae octo volutis constituantur.
Then of nine parts and a half, one part and a half are to be left as the thickness of the abacus, and the remaining eight parts are to be allotted to the volutes.
final_alignments\Vitruvius_Architecture_Book_3.json