altitude fro the orisonte; and make a nombre of bothe thise
altitudes. Tak thanne and abate half that nombre, and tak ther
5
the elevacioun of the pol artik in that same regioun. And for
more declaracioun, lo here thy figure.
[25.] A-nother conclusioun to prove the latitude of the regioun, &c.
[Alia conclusio ad probandum latitudinem regionis.]
Understond wel that the latitude of any place in a regioun is
verreyly the space by-twixe the senith of hem that dwellen there
and the equinoxial cerkle, north or southe, taking the mesure in