Iter autem in mundo Mercuri stella ita pervolitat, uti trecentesimo et sexagensimo die per signorum spatia currens perveniat ad id signum, ex quo priore circulatione coepit facere cursum, et ita peraequatur eius iter, ut circiter tricenos dies in singulis signis habeat numeri rationem.
The planet Mercury so completes its path in the firmament that, traversing the spaces of the signs, it arrives on the three-hundred-and-sixtieth day at that sign, from which in its previous revolution it entered on its course. Its path is so averaged that it spends about thirty days in each sign.
final_alignments\Vitruvius_Architecture_Book_9.json