latitude of the regioun. Ensample as thus: par aventure, the
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altitude of A in the evening is 56 degrees of heyghte. Than
wol his seconde altitude or the dawing be 48; that is 8 lasse than
56, that was his firste altitude at even. Take thanne the half of
8, and adde it to 48, that was his seconde altitude, and than
hastow 52. Now hastow the heyghte of thy pol, and the latitude
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of the regioun. But understond wel, that to prove this conclusioun
and many a-nother fair conclusioun, thou most have a plomet