Today | News | Books | Recipes Adventure | Science Fiction | Ghost stories | Poetry | Children | History Bookterre up-on the lyne meridional, and tak keep of thy zodiak, and loke what degree of any signe that sit on the same lyne meridional at that same tyme, and tak the degree in which the sterre standeth; and with that same degree comth that same sterre un-to that same lyne fro the orisonte. And for more 5 declaracioun, lo here thy figure. 19. TO KNOWE WITH WHICH DEGREE OF THE ZODIAK ANY STERRE FIXE IN THYN ASTROLABIE ARYSETH UP-ON THE EST ORISONTE, ALTHOGH HIS DWELLING BE IN A-NOTHER SIGNE. [AD COGNOSCENDUM CUM QUIBUS GRADIBUS ZODIACI QUE STELLA FIXA IN ASTROLABIO ASCENDIT SUPER ORIZONTEM ORIENTALEM, QUAMVIS EIUS STATIO SIT IN ALIO SIGNO.] Set the centre of the sterre up-on the est orisonte, and loke what degree of any signe that sit up-on the same orisonte at that same tyme. And understond wel, that with that same degree aryseth that same sterre; and this merveyllous arysing with a strange degree in another signe is by-cause that the latitude of the 5 sterre fix is either north or south fro the equinoxial. But sothly the latitudes of planetes ben comunly rekned fro the ecliptik, bi-cause that non of hem declineth but fewe degrees out fro the brede of the zodiak. And tak good keep of this chapitre of arysing of the celestial bodies; for truste wel, that neyther mone ne sterre 10 as in oure embelif orisonte aryseth with that same degree of his longitude, save in o cas; and that is, whan they have no latitude fro the ecliptik lyne. But natheles, som tyme is everiche of thise planetes under the same lyne. And for more declaracioun, lo here thy figure. 15 20. TO KNOWE THE DECLINACIOUN OF ANY DEGREE IN THE ZODIAK FRO THE EQUINOXIAL CERCLE, &C. [AD COGNOSCENDUM DECLINACIONEM ALICUIUS GRADUS IN ZODIACO A CIRCULO EQUINOCTIALI.] Set the degree of any signe up-on the lyne meridional, and rikne his altitude in almikanteras fro the est orizonte up to the same degree set in the forseide lyne, and set ther a prikke. Turne up thanne thy riet, and set the heved of Aries or Libra in the same meridional lyne, and set ther a-nother prikke. And whan that 5 this is don, considere the altitudes of hem bothe; for sothly the difference of thilke altitudes is the declinacion of thilke degree fro the equinoxial. And yif so be that thilke degree be northward fro the equinoxial, than is his declinacion north; yif it be southward, than is it south. And for the more declaracioun, lo here 10 thy figure. 21. TO KNOWE FOR WHAT LATITUDE IN ANY REGIOUN THE ALMIKANTERAS OF ANY TABLE BEN COMPOUNED. [AD COGNOSCENDUM PRO QUA LATITUDINE IN ALIQUA REGIONE ALMICANTRE TABULE MEE SUNT COMPOSITE.] Rikne how manye degrees of almikanteras, in the meridional lyne, be fro the cercle equinoxial un-to the senith; or elles fro the pool artik un-to the north orisonte; and for so gret a latitude or for so smal a latitude is the table compouned. And for more declaracion, lo here thy figure. 5 22. TO KNOWE IN SPECIAL THE LATITUDE OF OURE COUNTRAY, I MENE AFTER THE LATITUDE OF OXENFORD, AND THE HEIGHTE OF OURE POL. [AD COGNOSCENDUM SPECIALITER LATITUDINEM NOSTRI REGIONIS, SCILICET LATITUDINEM OXONIE, ET ALTITUDINEM POLI NOSTRI.] Understond wel, that as fer is the heved of Aries or Libra in the equinoxial from oure orisonte as is the senith from the pole artik; and as hey is the pol artik fro the orisonte, as the equinoxial is fer fro the senith. I prove it thus by the latitude of Oxenford. Understond wel, that the heyghte of oure pool artik fro oure north 5 orisonte is 51 degrees and 50 minutes; than is the senith from oure pool artik 38 degrees and 10 minutes; than is the equinoxial from oure senith 51 degrees and 50 minutes; than is oure south orisonte from oure equinoxial 38 degrees and 10 minutes. Understond wel this rekning. Also for-get nat that the senith is 90 10 degrees of heyghte fro the orisonte, and oure equinoxial is 90 degrees from oure pool artik. Also this shorte rewle is soth, that the latitude of any place in a regioun is the distance fro the senith unto the equinoxial. And for more declaracioun, lo here thy figure. 15 23. TO PROVE EVIDENTLY THE LATITUDE OF ANY PLACE IN A REGIOUN, BY THE PREVE OF THE HEYGHTE OF THE POL ARTIK IN THAT SAME PLACE. [AD PROBANDUM EVIDENTER LATITUDINEM ALICUIUS LOCI IN ALIQUA REGIONE, PER PROBACIONEM ALTITUDINIS DE POLO ARTICO IN EODEM LOCO.] In some winters night, whan the firmament is clere and thikke-sterred, waite a tyme til that any sterre fix sit lyne-right perpendiculer over the pol artik, and clepe that sterre A. And wayte a-nother sterre that sit lyne-right under A, and under the pol, and clepe that sterre F. And understond wel, that F is nat 5 considered but only to declare that A sit evene overe the pool. Tak thanne a-non right the altitude of A from the orisonte, and forget it nat. Lat A and F go farwel til agayns the dawening a gret whyle; and come thanne agayn, and abyd til that A is evene under the pol and under F; for sothly, than wol F sitte over the pool, 10 and A wol sitte under the pool. Tak than eft-sones the altitude of A from the orisonte, and note as wel his secounde altitude as his firste altitude; and whan that this is don, rikne how manye degrees that the firste altitude of A excedeth his seconde altitude, and tak half thilke porcioun that is exceded, and adde it to his seconde 15 altitude; and tak ther the elevacioun of thy pool, and eke the latitude of thy regioun. For thise two ben of a nombre; this is to seyn, as many degrees as thy pool is elevat, so michel is the latitude of the regioun. Ensample as thus: par aventure, the altitude of A in the evening is 56 degrees of heyghte. Than 20 wol his seconde altitude or the dawing be 48; that is 8 lasse than 56, that was his firste altitude at even. Take thanne the half of 8, and adde it to 48, that was his seconde altitude, and than hastow 52. Now hastow the heyghte of thy pol, and the latitude of the regioun. But understond wel, that to prove this conclusioun 25 and many a-nother fair conclusioun, thou most have a plomet hanging on a lyne heyer than thin heved on a perche; and thilke lyne mot hange evene perpendiculer by-twixe the pool and thyn eye; and thanne shaltow seen yif A sitte evene over the pool and over F at evene; and also yif F sitte evene over the pool and 30 over A or day. And for more declaracion, lo here thy figure. 24. ANOTHER CONCLUSIOUN TO PROVE THE HEYGHTE OF THE POOL ARTIK FRO THE ORISONTE. [ALIA CONCLUSIO AD PROBANDUM ALTITUDINEM DE POLO ARTICO AB ORIZONTE.] Tak any sterre fixe that nevere dissendeth under the orisonte in thilke regioun, and considere his heyest altitude and his lowest altitude fro the orisonte; and make a nombre of bothe thise altitudes. Tak thanne and abate half that nombre, and tak ther the elevacioun of the pol artik in that same regioun. And for 5 more declaracioun, lo here thy figure. 25. A-NOTHER CONCLUSIOUN TO PROVE THE LATITUDE |