Cum haec ita ad centrum porrectionibus et circinationibus reciperent motos, tunc vero etiam plostra, raedae, tympana, rotae, cocleae, scorpionis, ballistae, prela ceteraeque machinae isdem rationibus per porrectum centrum et rotationem circini versantum faciunt ad pro-positum effectus.
Since in this way such contrivances take movements at a centre, both rectilinear and circular, so also waggons, carts, drum-wheels and other wheels, screws, scorpions, balistae, presses and other machines produce the desired effect with parts moving about a centre along a straight line and by a rotation round it.
final_alignments\Vitruvius_Architecture_Book_10.json