Et tum circini centrum conlocandum est eo loci, quo secat circinationem aequinoctialis radius, ubi erit littera d; et deducendum ad eum locum, quo secat circinationem aestivus radius, ubi est littera h.
Then the centre of the compasses is to be placed on the point marked d where the equinoctial radius cuts the circumference, and they are to be extended to the point h where the circumference is intersected by the summer radius.
final_alignments\Vitruvius_Architecture_Book_9.json