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ave founde
 this werk of my labour or of myn engin. I nam but a lewd compilatour
 of the labour of olde Astrologiens, and have hit translated
 in myn English only for thy doctrine; and with this swerd shal I 45
 sleen envye.

 I. The firste partie of this tretis shal reherse the figures and the
 membres of thyn Astrolabie, bi-cause that thou shalt han the
 grettre knowing of thyn owne instrument.

 II. The second partie shal teche thee werken the verrey 50
 practik of the forseide conclusiouns, as ferforth and as narwe
 as may be shewed in so smal an instrument portatif aboute.
 For wel wot every astrologien that smalest fraccions ne wol
 nat ben shewed in so smal an instrument, as in subtil tables
 calculed for a cause. 55

 III. The thridde partie shal contienen diverse tables of
 longitudes and latitudes of sterres fixe for the Astrolabie, and
 tables of declinacions of the sonne, and tables of longitudes
 of citeez and of townes; and as wel for the governance of a
 clokke as for to finde the altitude meridian; and many another 60
 notable conclusioun, after the kalendres of the reverent clerkes,
 frere I. Somer and frere N. Lenne.

 IV. The ferthe partie shal ben a theorik to declare the
 moevinge of the celestial bodies with the causes. The whiche
 ferthe partie in special shal shewen a table of the verray 65
 moeving of the mone from houre to houre, every day and in
 every signe, after thyn almenak; upon which table ther folwith
 a canon, suffisant to teche as wel the maner of the wyrking of
 that same conclusioun, as to knowe in oure orizonte with which
 degree of the zodiac that the mone ariseth in any latitude; 70
 and the arising of any planete after his latitude fro the ecliptik
 lyne.

 V. The fifte partie shal ben an introductorie after the statutz
 of oure doctours, in which thou maist lerne a gret part of the
 general rewles of theorik in astrologie. In which fifte partie 75
 shaltow finde tables of equacions of houses aftur the latitude of
 Oxenford; and tables of dignetes of planetes, and other noteful
 thinges, yif god wol vouche-sauf and his modur the mayde, mo
 than I be-hete, &c.

PART I.

HERE BIGINNETH THE DESCRIPCION OF THE ASTROLABIE.

 1. Thyn Astrolabie hath a ring to putten on the thoumbe of
 thy right hand in taking the heighte of thinges. And tak keep, for
 from hennes-forthward, I wol clepe the heighte of any thing that
 is taken by thy rewle, the altitude, with-oute mo wordes.

 2. This ring renneth in a maner turet, fast to the moder of
 thyn Astrolabie, in so rowm a space that hit desturbeth nat the
 instrument to hangen after his righte centre.

 3. The Moder of thyn Astrolabie is the thikkeste plate, perced
 with a large hole, that resseyveth in hir wombe the thinne plates
 compowned for diverse clymatz, and thy riet shapen in manere
 of a net or of a webbe of a loppe; and for the more declaracioun,
 lo here the figure. 5

 4. This moder is devyded on the bak-half with a lyne, that
 cometh dessendinge fro the ring down to the nethereste bordure.
 The whiche lyne, fro the for-seide ring un-to the centre of the
 large hole amidde, is cleped the south lyne, or elles the lyne
 meridional. And the remenant of this lyne downe to the bordure 5
 is cleped the north lyne, or elles the lyne of midnight. And for
 the more declaracioun, lo here the figure.

 5. Over-thwart this for-seide longe lyne, ther crosseth him
 another lyne of the same lengthe from est to west. Of the
 whiche lyne, from a litel croys + in the bordure un-to the centre
 of the large hole, is cleped the Est lyne, or elles the lyne Orientale;
 and the remenant of this lyne fro the forseide + un-to the bordure, 5
 is cleped the West lyne, or the lyne Occidentale. Now hastow
 here the foure quarters of thin Astrolabie, devyded after the foure
 principals plages or quarters of the firmament. And for the more
 declaracioun, lo here thy figure.

 6. The est side of thyn Astrolabie is cleped the right side, and
 the west side is cleped the left side. Forget nat this, litel Lowis.
 Put the ring of thyn Astrolabie upon the thoumbe of thy right
 hand, and thanne wole his right syde be toward thy left syde, and
 his left syde wol be toward thy right syde; tak this rewle general, 5
 as wel on the bak as on the wombe-side. Upon the ende of this
 est lyne, as I first seide, is marked a litel +, wher-as evere-mo
 generaly is considered the entring of the first degree in which the
 sonne aryseth. And for the more declaracioun, lo here the
 figure. 10

 7. Fro this litel + up to the ende of the lyne meridional, under
 the ring, shaltow finden the bordure devyded with 90 degrees;
 and by that same proporcioun is every quarter of thin Astrolabie
 devyded. Over the whiche degrees ther ben noumbres of augrim,
 that devyden thilke same degrees fro fyve to fyve, as sheweth by 5
 longe strykes by-twene. Of whiche longe strykes the space by-twene
 contienith a mile-wey. And every degree of the bordure
 contieneth foure minutes, that is to seyn, minutes of an houre.
 And for more declaracioun, lo here the figure.

 8. Under the compas of thilke degrees ben writen the names of
 the Twelve Signes, as Aries, Taurus, Gemini, Cancer, Leo, Virgo,
 Libra, Scorpio, Sagittarius, Capricornus, Aquarius, Pisces; and
 the nombres of the degrees of tho signes ben writen in augrim
 above, and with longe devisiouns, fro fyve to fyve; devyded fro 5
 tyme that the signe entreth un-to the laste ende. But understond
 wel, that thise degrees of signes ben everich of hem considered
 of 60 minutes, and every minute of 60 secondes, and so
 forth in-to smale fraccions infinit, as seith Alkabucius. And
 ther-for, know wel, that a degree of the bordure contieneth foure 10
 minutes, and a degree of a signe contieneth 60 minutes, and
 have this in minde. And for the more declaracioun, lo here
 thy figure.

 9. Next this folweth the Cercle of the Dayes, that ben figured
 in maner of degrees, that contienen in noumbre 365; divyded
 also with longe strykes fro fyve to fyve, and the nombres in
 augrim writen under that cercle. And for more declaracioun, lo
 here thy figure.

 10. Next the Cercle of the Dayes, folweth the Cercle of the
 names of the Monthes; that is to seyen, Ianuare, Februare,
 Marcius, Aprile, Mayus, Iuin, Iulius, Augustus, Septembre,
 October, Novembre, Decembre. The names of thise monthes
 were cleped in Arabiens, somme for hir propretees, and some by 5
 statutz of lordes, some by other lordes of Rome. Eek of thise
 monthes, as lyked to Iulius Cesar and to Cesar Augustus, some
 were compowned of diverse nombres of dayes, as Iuil and
 August. Thanne hath Ianuare 31 dayes, Februare 28, March
 31, Aprille 30, May 31, Iunius 30, Iulius 31, Augustus 31, 10
 September 30, Octobre 31, Novembre 30, December 31.
 Natheles, al-though that Iulius Cesar took 2 dayes out of Feverer
 and put hem in his moneth of Iuille, and Augustus Cesar cleped
 the moneth of August after his name, and ordeyned it of 31 dayes,
 yit truste we
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