Conpluvii lumen latum latitudinis atrii ne minus quarta, ne plus tertia parte relinquatur; longitudo, uti atrii pro rata parte fiat.
The width of the opening of the compluvium is to be not less than a fourth, nor more than a third, of the width of the atrium; the length, in proportion to the atrium.
final_alignments\Vitruvius_Architecture_Book_6.json