by mediacioun of thilke assenciouns thise astrologiens, by hir
tables and hir instrumentz, knowen verreyly the assencioun of
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every degree and minut in al the zodiak, as shal be shewed. And
nota, that this forseid righte orisonte, that is cleped orison rectum,
divydeth the equinoxial in-to right angles; and the embelif orisonte,
wher-as the pol is enhaused up-on the orisonte, overkerveth the
equinoxial in embelif angles, as sheweth in the figure. And for
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the more declaracioun, lo here the figure.