wel this rekning. Also for-get nat that the senith is 90
degrees of heyghte fro the orisonte, and oure equinoxial is 90
degrees from oure pool artik. Also this shorte rewle is soth, that
the latitude of any [place] in a regioun is the distance fro the senith
unto the equinoxial. And for more declaracioun, lo here thy
15
figure.
[23.] To prove evidently the latitude of any place in a regioun, by the preve of the heyghte of the pol artik in that same place.
[Ad probandum evidenter latitudinem alicuius loci in aliqua regione, per probacionem altitudinis de polo artico in eodem loco.]
In some winters night, whan the firmament is clere and thikke-sterred,