Chaucer's Works, Volume 3 — The House of Fame; The Legend of Good Women; The Treatise on the Astrolabe; The Sources of the Canterbury Tales

by Geoffrey Chaucer

in this wyse. Set the degree of thy sonne up-on the heyer

almikanteras of bothe, and waite wel wher as thin almury toucheth

the bordure, and set ther a prikke of inke. Set doun agayn the

degree of thy sonne up-on the nethere almikanteras of bothe, and

set ther another prikke. Remewe thanne thyn almury in the

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bordure evene amiddes bothe prikkes, and this wol lede iustly the

degree of thy sonne to sitte by-twixe bothe almikanteras in his

right place. Ley thanne thy label over the degree of thy sonne;

and find in the bordure the verrey tyde of the day or of the night.