For to knowe at what houre of the day, or of the night,
shal be flod or ebbe.
First wite thou certeinly, hou that haven stondeth, that thou
list to werke for; that is to say in which place of the firmament
the mone beyng, makith full see. Than awayte thou redily in what
degree of the zodiak that the mone at that tyme is ynne. Bring
furth than the label, and set the point therof in that same cost
that the mone makith flod, and set thou there the degree of the
mone according with the egge of the label. Than afterward awayte
where is than the degree of the sonne, at that tyme. Remeve thou
than the label fro the mone, and bring and set it justly upon the
degree of the sonne. And the point of the label shal than declare
to thee, at what houre of the day or of the night shal be flod.
And there also maist thou wite by the same point of the label,
whethir it be, at that same tyme, flod or ebbe, or half flod, or
quarter flod, or ebbe, or half or quarter ebbe; or ellis at what
houre it was last, or shal be next by night or by day, thou than
shalt esely knowe, &c. Furthermore, if it so be that thou happe
to worke for this matere aboute the tyme of the conjunccioun,
bring furth the degree of the mone with the label to that coste
as it is before seyd. But than thou shalt understonde that thou
may not bringe furth the label fro the degree of the mone as thou
dide before; for-why the sonne is than in the same degree with
the mone. And so thou may at that tyme by the point of the label
unremevid knowe the houre of the flod or of the ebbe, as it is
before seyd, &c. And evermore as thou findest the mone passe
fro the sonne, so remeve thou the label than fro the degree of
the mone, and bring it to the degree of the sonne. And work thou
than as thou dide before, &c. Or ellis know thou what houre it
is that thou art inne, by thyn instrument. Than bring thou furth
fro thennes the label and ley it upon the degree of the mone, and
therby may thou wite also whan it was flod, or whan it wol be
next, be it night or day; &c.
