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| Fragment II (Group B1). |
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To knowe the quantite of the day vulgar, that is to seyn fro spryng of the day unto verrey nyght.
Know the quantite of thy crepuscles, as I have taught in the 3 chapitre bifore, and adde hem to the arch of thy day artificial, and tak there the space of all the hool day vulgar unto verrey night. The same manere maist thou worche to knowe the quantite of the vulgar nyght.
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