Sub retinaculo chelonia duo figuntur, troclea funibus supra chelonia religatur, sub troclea regula longa circiter pedes duos, lata digitos sex, crassa quattuor supponitur.
Where the cables meet at the top, two sockets are fixed; the block is fixed to the sockets with ropes. Under the block is put a piece of timber about two feet long, six inches wide, and four inches thick.
final_alignments\Vitruvius_Architecture_Book_10.json