Rotae, quae erunt in raeda, sint latae per medium diametrum pedum quaternum [et sextantes], ut, cum finitum locum habeat in se rota ab eoque incipiat progrediens in solo viae facere versationem, perveniendo ad eam finitionem, a qua coeperit versari, certum modum spatii habeat peractum pedes xii s.
The wheels of the carriage are to be 4 feet in diameter, and on one wheel a point is to be marked. When the wheel begins to move forward from this point and to revolve on the road surface, it will have completed a distance of 12 1/2 feet on arriving at the point from which it began its revolution.
final_alignments\Vitruvius_Architecture_Book_10.json