Treatise on the Astrolabe 1: 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, is cleped the West lyne, or the lyne Occidentale. Now hastow here the ...
Treatise on the Astrolabe 1: 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.
Treatise on the Astrolabe 1: 17
... of the equinoxial maketh an houre equal of the clokke. This equinoxial is cleped the girdel of the firste moeving, or elles of the angulus primi motus vel primi mobilis. And nota, that firste moeving is cleped 'moeving' of the firste moevable of the 8 spere, whiche moeving is fro est to west, and eft agayn in-to est; also it is clepid 'girdel' of the first moeving, for it departeth the firste moevable, that is to seyn, the spere, in two ilyke parties, evene-distantz fro the poles of this world. The wydeste of thise three principal cercles is cleped the Cercle of Capricorne, by-cause ...
Treatise on the Astrolabe 2: 31
... 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 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. ...