To knowe the verrey equacioun of the degre of the
sonne yf so be that it falle bitwene thyn almykanteras.
For as muche as the almykanteras in thin Astrelabie ben
compowned by two and two, where as somme almykanteras in sondry
astrelabies be compowned by 1 and 1, or elles by 2 and 2, it is
necessarie to thy lernyng to teche the first to knowe and worke
with thin oune instrument. Wherfore whan that the degre of thi
sonne fallith bytwixe 2 almykanteras, or ellis yf thin
almykanteras ben graven with over-gret a poynt of a compas (for
bothe these thinges may causen errour as wel in knowing of the
tide of the day, as of the verrey ascendent), thou must worken
in this wise:
Set the degre of thy sonne upon the hyer almykanteras of
bothe, and wayte wel where as thin almury touchith the bordure
and set there a prikke of ynke. Sett doun agayn the degre of the
sunne upon the nether almykanteras of bothe, and sett there
another pricke. Remeve than thin almury in the bordure evene
amiddes bothe prickes, and this wol lede justly the degre of thi
sonne to sitte bitwene bothe almykanteras in his right place. Ley
than thy label over the degre of thi sonne, and fynd in the
bordure the verrey tyde of the day, or of the night. And as
verraily shalt thou fynde upon thin est orisonte thin
ascendent.
