Today | News | Books | Recipes Adventure | Science Fiction | Ghost stories | Poetry | Children | History Booktryk of the plate under the forseide west orisonte; and evere, as the sonne climbeth uppere and uppere, so goth his nadir dounere and dounere, teching by swich strykes the houres of planetes by ordre as they sitten in 15 the hevene. The first houre inequal of every Satterday is to Saturne; and the secounde, to Iupiter; the 3, to Mars; the 4, to the Sonne; the 5, to Venus; the 6, to Mercurius; the 7, to the Mone; and thanne agayn, the 8 is to Saturne; the 9, to Iupiter; the 10, to Mars; the 11, to the Sonne; the 12, to 20 Venus; and now is my sonne gon to reste as for that Setterday. Thanne sheweth the verrey degree of the sonne the houre of Mercurie entring under my west orisonte at eve; and next him succedeth the Mone; and so forth by ordre, planete after planete, in houre after houre, al the night longe til the sonne 25 aryse. Now ryseth the sonne that Sonday by the morwe; and the nadir of the sonne, up-on the west orizonte, sheweth me the entring of the houre of the forseide sonne. And in this maner succedeth planete under planete, fro Saturne un-to the Mone, and fro the Mone up a-gayn to Saturne, houre after houre 30 generaly. And thus knowe I this conclusioun. And for the more declaracioun, lo here the figure. 13. TO KNOWE THE ALTITUDE OF THE SONNE IN MIDDES OF THE DAY, THAT IS CLEPED THE ALTITUDE MERIDIAN. [AD COGNOSCENDUM ALTITUDINEM SOLIS IN MEDIO DIEI, QUE VOCATUR ALTITUDO MERIDIANA.] Set the degree of the sonne up-on the lyne meridional, and rikene how many degrees of almikanteras ben by-twixe thyn est orisonte and the degree of the sonne. And tak ther thyn altitude meridian; this is to seyne, the heyest of the sonne as for that day. So maystow knowe in the same lyne, the heyest cours that any 5 sterre fix climbeth by night; this is to seyn, that whan any sterre fix is passed the lyne meridional, than by-ginneth it to descende, and so doth the sonne. And for the more declaracioun, lo here thy figure. 14. TO KNOWE THE DEGREE OF THE SONNE BY THY RIET, FOR A MANER CURIOSITEE, &C. [AD COGNOSCENDUM GRADUM SOLIS CURIOSE.] Sek bysily with thy rewle the heyest of the sonne in midde of the day; turne thanne thyn Astrolabie, and with a prikke of ink marke the nombre of that same altitude in the lyne meridional. Turne thanne thy riet a-boute til thou fynde a degree of thy zodiak acording with the prikke, this is to seyn, sittinge on the 5 prikke; and in sooth, thou shalt finde but two degrees in al the zodiak of that condicioun; and yit thilke two degrees ben in diverse signes; than maistow lightly by the sesoun of the yere knowe the signe in whiche that is the sonne. And for the more declaracioun, lo here thy figure. 10 15. TO KNOW WHICH DAY IS LYK TO WHICH DAY AS OF LENGTHE, &C. [AD COGNOSCENDUM QUALES DIES IN LONGITUDINE SUNT SIMILES.] Loke whiche degrees ben y-lyke fer fro the hevedes of Cancer and Capricorn; and lok, whan the sonne is in any of thilke degrees, than ben the dayes y-lyke of lengthe. This is to seyn, that as long is that day in that monthe, as was swich a day in swich a month; ther varieth but lite. Also, yif thou take two 5 dayes naturaly in the yer y-lyke fer fro eyther pointe of the equinoxial in the opposit parties, than as long is the day artificial of that on day as is the night of that othere, and the contrarie. And for the more declaracioun, lo here thy figure. 16. THIS CHAPITRE IS A MANER DECLARACIOUN TO CONCLUSIOUNS THAT FOLWEN. [ILLUD CAPITULUM EST QUEDAM DECLARACIO AD CERTAS CONCLUSIONES SEQUENTES.] Understond wel that thy zodiak is departid in two halfe cercles, as fro the heved of Capricorne un-to the heved of Cancer; and agaynward fro the heved of Cancer un-to the heved of Capricorne. The heved of Capricorne is the lowest point, wher-as the sonne goth in winter; and the heved of Cancer is the heyest point, in 5 whiche the sonne goth in somer. And ther-for understond wel, that any two degrees that ben y-lyke fer fro any of thise two hevedes, truste wel that thilke two degrees ben of y-lyke declinacioun, be it southward or northward; and the dayes of hem ben y-lyke of lengthe, and the nightes also; and the shadwes 10 y-lyke, and the altitudes y-lyke at midday for evere. And for more declaracioun, lo here thy figure. 17. TO KNOWE THE VERREY DEGREE OF ANY MANER STERRE STRAUNGE OR UNSTRAUNGE AFTER HIS LONGITUDE, THOUGH HE BE INDETERMINAT IN THYN ASTROLABIE; SOTHLY TO THE TROWTHE, THUS HE SHAL BE KNOWE. [AD COGNOSCENDUM VERUM GRADUM ALICUIUS STELLE ALIENE SECUNDUM EIUS LONGITUDINEM, QUAMVIS SIT INDETERMINATA IN ASTROLABIO; VERACITER ISTO MODO.] Tak the altitude of this sterre whan he is on the est side of the lyne meridional, as ney as thou mayst gesse; and tak an assendent a-non right by som maner sterre fix which that thou knowest; and for-get nat the altitude of the firste sterre, ne thyn assendent. And whan that this is don, espye diligently whan this 5 same firste sterre passeth any-thing the south westward, and hath him a-non right in the same noumbre of altitude on the west side of this lyne meridional as he was caught on the est side; and tak a newe assendent a-non right by som maner sterre fixe which that thou knowest; and for-get nat this secounde assendent. And 10 whan that this is don, rikne thanne how manye degrees ben by-twixe the firste assendent and the seconde assendent, and rikne wel the middel degree by-twene bothe assendentes, and set thilke middel degree up-on thin est orisonte; and waite thanne what degree that sit up-on the lyne meridional, and tak ther the verrey degree 15 of the ecliptik in which the sterre stondeth for the tyme. For in the ecliptik is the longitude of a celestial body rekened, evene fro the heved of Aries un-to the ende of Pisces. And his latitude is rikned after the quantite of his declinacion, north or south to-warde the poles of this world; as thus. Yif it be of the sonne or of any 20 fix sterre, rekene his latitude or his declinacioun fro the equinoxial cercle; and yif it be of a planete, rekne than the quantitee of his latitude fro the ecliptik lyne. Al-be-it so that fro the equinoxial may the declinacion or the latitude of any body celestial be rikned, after the site north or south, and after the quantitee of his declinacion. 25 And right so may the latitude or the declinacion of any body celestial, save only of the sonne, after his site north or south, and after the quantitee of his declinacioun, be rekned fro the ecliptik lyne; fro which lyne alle planetes som tyme declynen north or south, save only the for-seide sonne. And for the more 30 declaracioun, lo here thy figure. 18. TO KNOWE THE DEGREES OF THE LONGITUDES OF FIXE STERRES AFTER THAT THEY BEN DETERMINAT IN THIN ASTROLABIE, YIF SO BE THAT THEY BEN TREWLY SET. [AD COGNOSCENDUM GRADUS LONGITUDINIS DE STELLIS FIXIS QUE DETERMINANTUR IN ASTROLABIO, SICUT IN SUIS LOCIS RECTE LOCENTUR.] Set the centre of the s |