Chaucer's Works, Volume 3 — The House of Fame; The Legend of Good Women; The Treatise on the Astrolabe; The Sources of the Canterbury TalesChaucer, Geoffrey
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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
Chaucer, Geoffrey
English poetry -- Middle English, 1100-1500
[AD COGNOSCENDUM SIGNUM DE ORTU SOLIS, SCILICET, ILLAM PARTEM ORIENTIS IN
QUA ORITUR SOL.]
Thou most first considere that the sonne aryseth nat al-wey
verrey est, but some tyme by north the est, and som tyme by southe
the est. Sothly, the sonne aryseth never-mo verrey est in oure
orisonte, but he be in the heved of Aries or Libra. Now is thyn
orisonte departed in 24 parties by thy azimutz, in significacion of 5
24 partiez of the world; al-be-it so that shipmen rikne thilke
partiez in 32. Thanne is ther no more but waite in which azimut
that thy sonne entreth at his arysing; and take ther the senith of
the arysing of the sonne. The manere of the devisioun of thyn
Astrolabie is this; I mene, as in this cas. First is it devided in 10
4 plages principalx with the lyne that goth from est to west, and
than with a-nother lyne that goth fro south to north. Than is it
devided in smale partiez of azimutz, as est, and est by southe,
whereas is the firste azimut above the est lyne; and so forth, fro
partie to partie, til that thou come agayn un-to the est lyne. 15
Thus maistow understond also the senith of any sterre, in which
partie he ryseth, &c. And for the more declaracion, lo here
the figure.
32. TO KNOWE IN WHICH PARTIE OF THE FIRMAMENT IS THE CONIUNCCIOUN.
[AD COGNOSCENDUM IN QUA PARTE FIRMAMENTI SUNT CONIUNCCIONES SOLIS ET
LUNE.]
Considere the tyme of the coniunccion by thy kalender, as thus;
lok how many houres thilke coniunccion is fro the midday of the
day precedent, as sheweth by the canoun of thy kalender. Rikne
thanne thilke nombre of houres in the bordure of thyn Astrolabie,
as thou art wont to do in knowing of the houres of the day or of 5
the night; and ley thy label over the degree of the sonne; and
thanne wol the point of thy label sitte up-on the hour of the
coniunccion.
Loke thanne in which azimut the degree of thy sonne
sitteth, and in that partie of the firmament is the coniunccioun.
And for the more declaracioun, lo here thy figure.
33. TO KNOWE THE SENITH OF THE ALTITUDE OF THE SONNE, &C.
[AD COGNOSCENDUM SIGNA DE ALTITUDINE SOLIS.]
This is no more to seyn but any tyme of the day tak the altitude
of the sonne; and by the azimut in which he stondeth, maystou
seen in which partie of the firmament he is. And in the same
wyse maystou seen, by the night, of any sterre, whether the
sterre sitte est or west or north, or any partie by-twene, after the 5
name of the azimut in which is the sterre. And for the more
declaracioun, lo here the figure.
34. TO KNOWE SOTHLY THE DEGREE OF THE LONGITUDE OF THE MONE, OR OF ANY
PLANETE THAT HATH NO LATITUDE FOR THE TYME FRO THE ECLIPTIK LYNE.
[AD COGNOSCENDUM VERACITER GRADUM DE LONGITUDINE LUNE, VEL ALICUIUS
PLANETE QUI NON HABET LONGITUDINEM PRO TEMPORE CAUSANTO LINEA
ECLIPTICA.]
Public-domain text, read in full here on John Shaqi.
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