13. Thanne hastow a brood Rewle, that hath on either ende a square plate perced with a certein holes, some more and some lesse, to resseyven the stremes of the sonne by day, and eek by mediacioun of thyn eye, to knowe the altitude of sterres by nighte. And for the more declaracioun, lo here thy figure. 5 14. Thanne is ther a large Pyn, in maner of an extree, that goth thorow the hole that halt the tables of the clymates and the riet in the wombe of the Moder, thorw which Pyn ther goth a litel wegge which that is cleped 'the hors,' that streyneth alle thise parties to-hepe; this forseide grete Pyn, in maner of an 5 extree, is imagined to be the Pol Artik in thyn Astrolabie. And for the more declaracioun, lo here the figure. 15. The wombe-side of thyn Astrolabie is also devyded with a longe croys in foure quarters from est to west, fro south to north, fro right syde to left syde, as is the bak-syde. And for the more declaracioun, lo here thy figure. 16. The bordure of which wombe-side is devyded fro the poynt of the est lyne un-to the poynt of the south lyne under the ring, in 90 degres; and by that same proporcioun is every quarter devyded as is the bak-syde, that amonteth 360 degrees. And understond wel, that degrees of this bordure ben answering and 5 consentrik to the degrees of the Equinoxial, that is devyded in the same nombre as every othere cercle is in the heye hevene. This same bordure is devyded also with 23 lettres capitals and a smal croys + above the south lyne, that sheweth the 24 houres equals of the clokke; and, as I have said, 5 of thise degrees 10 maken a mile-wey, and 3 mile-wey maken an houre. And every degree of this bordure conteneth 4 minutes, and every minut 60 secoundes; now have I told thee twye. And for the more declaracioun, lo here the figure.