This lyne meridional is but a maner descripcion of lyne imagined, that passeth upon the poles of this world and by the senith of oure heved. And hit is y-cleped the lyne meridional; for in what place that any maner man is at any tyme of the yeer, whan that the sonne by moeving of the firmament cometh to his 5 verrey meridian place, than is hit verrey midday, that we clepen oure noon, as to thilke man; and therfore is it cleped the lyne of midday. And _nota_, for evermo, of 2 citees or of 2 tounes, of whiche that o toun aprocheth more toward the est than doth that other toun, truste wel that thilke tounes ban diverse meridians. 10 _Nota_ also, that the arch of the equinoxial, that is conteyned or bounded by-twixe the 2 meridians, is cleped the longitude of the toun. And yif so be that two tounes have y-lyke meridian, or oon meridian, than is the distance of hem bothe y-lyke fer fro the est; and the contrarie. And in this manere they 15 chaunge nat her meridian, but sothly they chaungen her almikanteras; for the enhausing of the pool and the distance of the sonne. The longitude of a clymat is a lyne imagined fro est to west, y-lyke distant by-twene them alle. The latitude of a clymat is a lyne imagined from north to south the space of the erthe, 20 fro the byginning of the firste clymat unto the verrey ende of the same climat, evene directe agayns the pole artik. Thus seyn some auctours; and somme of hem seyn that yif men clepen the latitude, thay mene the arch meridian that is contiened or intercept by-twixe the senith and the equinoxial. Thanne sey they that 25 the distaunce fro the equinoxial unto the ende of a clymat, evene agayns the pole artyk, is the latitude of a clymat for sothe. And for more declaracioun, lo here thy figure. 40. TO KNOWE WITH WHICH DEGREE OF THE ZODIAK THAT ANY PLANETE ASSENDITH ON THE ORISONTE, WHETHER SO THAT HIS LATITUDE BE NORTH OR SOUTH.