Tak the altitude of the mone, and rikne thyn altitude up among thyne almikanteras on which syde that the mone stande; and set there a prikke. Tak thenne anon-right, up-on the mones syde, the altitude of any sterre fix which that thou knowest, and set his centre up-on his altitude among thyn almikanteras ther the sterre 5 is founde. Waite thanne which degree of the zodiak toucheth the prikke of the altitude of the mone, and tak ther the degree in which the mone standeth. This conclusioun is verrey soth, yif the sterres in thyn Astrolabie stonden after the trowthe; of comune, tretis of Astrolabie ne make non excepcioun whether the 10 mone have latitude, or non; ne on whether syde of the mone the altitude of the sterre fix be taken. And _nota_, that yif the mone shewe himself by light of day, than maystow wyrke this same conclusioun by the sonne, as wel as by the fix sterre. And for the more declaracioun, lo here thy figure. 15 35. THIS IS THE WORKINGE OF THE CONCLUSIOUN, TO KNOWE YIF THAT ANY PLANETE BE DIRECTE OR RETROGRADE. [HEC CONCLUSIO OPERATUR AD COGNOSCENDUM SI ALIQUA PLANETA SIT DIRECTA VEL RETROGRADA.] Tak the altitude of any sterre that is cleped a planete, and note it wel. And tak eek anon the altitude of any sterre fix that thou knowest, and note it wel also. Come thanne agayn the thridde or the ferthe night next folwing; for thanne shaltow aperceyve wel the moeving of a planete, whether so he moeve forthward or bakward. 5 Awaite wel thanne whan that thy sterre fix is in the same altitude that she was whan thou toke hir firste altitude; and tak than eftsones the altitude of the forseide planete, and note it wel. For trust wel, yif so be that the planete be on the right syde of the meridional lyne, so that his seconde altitude be lasse than his firste altitude 10 was, thanne is the planete directe. And yif he be on the west syde in that condicion, thanne is he retrograd. And yif so be that this planete be up-on the est syde whan his altitude is taken, so that his secounde altitude be more than his firste altitude, thanne is he retrograde, and yif he be on the west syde, than is he 15 directe. But the contrarie of thise parties is of the cours of the mone; for sothly, the mone moeveth the contrarie from othere planetes as in hir episicle, but in non other manere. And for the more declaracioun, lo here thy figure. 36. THE CONCLUSIOUNS OF EQUACIOUNS OF HOUSES, AFTER THE ASTROLABIE, &C. [CONCLUSIO DE EQUACIONE DOMORUM.]