In capitibus circino dividentur circumitiones eorum tetrantibus et octantibus in partes octo, eaeque lineae ita conlocentur, ut plano posito tigno utriusque capitis ad libellam lineae inter se respondeant, et quam magna pars sit octava circinationis tigni, tam magna spatia decidantur in longitudinem.
At the ends the circumference is to be divided by a compass into quadrants and eighths and so to eight parts; and the diagonals are to be so drawn that when the beam is horizontal the lines at either end correspond exactly. The whole length is to be marked off into spaces equal to one-eighth of the circumference.
final_alignments\Vitruvius_Architecture_Book_10.json