[35.] This is the workinge of the conclusioun, to knowe yif that any planete be directe or retrograde.
[Hec conclusio operatur ad cognoscendum si aliqua planeta sit directa vel retrograda.]
Tak the altitude of any sterre that is cleped a planete, and note
it wel. And tak eek anon the altitude of any sterre fix that thou
knowest, and note it wel also. Come thanne agayn the thridde or
the ferthe night next folwing; for thanne shaltow aperceyve wel the
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moeving of a planete, whether so he moeve forthward or bakward.
Awaite wel thanne whan that thy sterre fix is in the same altitude that
she was whan thou toke hir firste altitude; and tak than eftsones