Erectio autem eius ad inclinationem sic erit conlocanda, uti, quemadmodum Pythagoricum trigonum orthogonium describitur, sic id habeat responsum, id est uti dividatur longitudo in partes v, earum trium extollatur caput cocleae; ita erit ab perpendiculo ad imas naris spatium earum partium iiii.
The fixing of the screw is to be done at such a slope that it corresponds to the manner in which the Pythagorean right-angled triangle is described: that is, the length is to be divided into 5 parts of which the head of the screw is to be raised three. Thus there will be, between the perpendicular and the lower mouth, a length of 4 parts.
final_alignments\Vitruvius_Architecture_Book_10.json