Today | News | Books | Recipes Adventure | Science Fiction | Ghost stories | Poetry | Children | History Book20 de ceteris_. 43. UMBRA RECTA. An-other maner of wyrking be _umbra recta_. Yif it so be that thou mayst nat come to the baas of the tour, in this maner thou schalt werke. Sette thy rewle upon 1 till thou see the altitude, and sette at thy foot a prikke. Than sette thy rewle upon 2, and beholde what is the differense be-tween 1 and 2, and thou shalt 5 finde that it is 1. Than mete the space be-tween two prikkes, and that is the 12 partie of the altitude of the tour. And yif ther were 2, it were the 6 partye; and yif ther were 3, the 4 partye; _et sic deinceps_. And note, yif it were 5, it were the 5 party of 12; and 7, 7 party of 12; and note, at the altitude of thy conclusioun, 10 adde the stature of thyn heyghte to thyn eye. 44. ANOTHER MANER CONCLUSION, TO KNOWE THE MENE MOTE AND THE ARGUMENTIS OF ANY PLANETE. TO KNOW THE MENE MOTE AND THE ARGUMENTIS OF EVERY PLANETE FRO YERE TO YERE, FROM DAY TO DAY, FROM HOURE TO HOURE, AND FROM SMALE FRACCIONIS INFINITE. [AD COGNOSCENDUM MEDIOS MOTUS ET ARGUMENTA DE HORA IN HORAM CUIUSLIBET PLANETE, DE ANNO IN ANNUM, DE DIE IN DIEM.] In this maner shall thou worche: consider thy rote first, the whiche is made the beginning of the tables fro the yere of oure lord 1397, and entere hit in-to thy slate for the laste meridie of December; and than consider the yere of oure lord, what is the date, and be-hold whether thy date be more or lasse than the yere 5 1397. And yf hit so be that hit be more, loke how many yeres hit passeth, and with so many entere into thy tables in the first lyne ther-as is writen _anni collecti et expansi_. And loke where the same planet is writen in the hede of thy table, and than loke what thou findest in directe of the same yere of oure lord whiche 10 is passid, be hit 8, or 9, or 10, or what nombre that evere it be, til the tyme that thou come to 20, or 40, or 60. And that thou findest in directe wryte in thy slate under thy rote, and adde hit to-geder, and that is thy mene mote, for the laste meridian of the December, for the same yere whiche that thou hast purposed. 15 And if hit so be that hit passe 20, consider wel that fro 1 to 20 ben _anni expansi_, and fro 20 to 3000 ben _anni collecti_; and if thy nombere passe 20, than take that thou findest in directe of 20, and if hit be more, as 6 or 18, than take that thou findest in directe there-of, that is to sayen, signes, degrees, minutes, and secoundes, 20 and adde to-gedere un-to thy rote; and thus to make rotes; and note, that if hit so be that the yere of oure lord be lasse than the rote, whiche is the yere of oure lord 1397, than shalt thou wryte in the same wyse furst thy rote in thy slate, and after entere in-to thy table in the same yere that be lasse, as I taught be-fore; and 25 than consider how many signes, degrees, minutes, and secoundes thyn entringe conteyneth. And so be that ther be 2 entrees, than adde hem togeder, and after with-drawe hem from the rote, the yere of oure lord 1397; and the residue that leveth is thy mene mote fro the laste meridie of December, the whiche 30 thou hast purposed; and if hit so be that thou wolt weten thy mene mote for any day, or for any fraccioun of day, in this maner thou shalt worche. Make thy rote fro the laste day of Decembere in the maner as I have taught, and afterward behold how many monethis, dayes, and houres ben passid from 35 the meridie of Decembere, and with that entere with the laste moneth that is ful passed, and take that thou findest in directe of him, and wryte hit in thy slate; and entere with as mony dayes as be more, and wryte that thou findest in directe of the same planete that thou worchest for; and in the same wyse in 40 the table of houres, for houres that ben passed, and adde alle these to thy rote; and the residue is the mene mote for the same day and the same houre. 45. ANOTHER MANERE TO KNOWE THE MENE MOTE. Whan thou wolt make the mene mote of eny planete to be by Arsechieles tables, take thy rote, the whiche is for the yere of oure lord 1397; and if so be that thy yere be passid the date, wryte that date, and than wryte the nombere of the yeres. Than withdrawe the yeres out of the yeres that ben passed that rote. 5 Ensampul as thus: the yere of oure lord 1400, I wolde witen, precise, my rote; than wroot I furst 1400. And under that nombere I wrote a 1397; than withdraw I the laste nombere out of that, and than fond I the residue was 3 yere; I wiste that 3 yere was passed fro the rote, the whiche was writen in 10 my tables. Than after-ward soghte I in my tables the _annis collectis et expansis_, and amonge myn expanse yeres fond I 3 yeer. Than tok I alle the signes, degrees, and minutes, that I fond directe under the same planete that I wroghte for, and wroot so many signes, degrees, and minutes in my slate, and 15 afterward added I to signes, degrees, minutes, and secoundes, the whiche I fond in my rote the yere of oure lord 1397; and kepte the residue; and than had I the mene mote for the laste day of Decembere. And if thou woldest wete the mene mote of any planete in March, Aprile, or May, other 20 in any other tyme or moneth of the yere, loke how many monethes and dayes ben passed from the laste day of Decembere, the yere of oure lord 1400; and so with monethes and dayes entere in-to thy table ther thou findest thy mene mote y-writen in monethes and dayes, and take alle the signes, 25 degrees, minutes, and secoundes that thou findest y-write in directe of thy monethes, and adde to signes, degrees, minutes, and secoundes that thou findest with thy rote the yere of oure lord 1400, and the residue that leveth is the mene mote for that same day. And note, if hit so be that thou woldest 30 wete the mene mote in ony yere that is lasse than thy rote, withdrawe the nombere of so many yeres as hit is lasse than the yere of oure lord a 1397, and kepe the residue; and so many yeres, monethes, and dayes entere in-to thy tabelis of thy mene mote. And take alle the signes, degrees, and minutes, and 35 secoundes, that thou findest in directe of alle the yeris, monethes, and dayes, and wryte hem in thy slate; and above thilke nombere wryte the signes, degrees, minutes, and secoundes, the whiche thou findest with thy rote the yere of oure lord a 1397; and with-drawe alle the nethere signes and degrees fro the signes and 40 degrees, minutes, and secoundes of other signes with thy rote; and thy residue that leveth is thy mene mote for that day. 46. FOR TO KNOWE AT WHAT HOURE OF THE DAY, OR OF THE NIGHT, SHAL BE FLODE OR EBBE. First wite thou certeinly, how that haven stondeth, that thou list to werke for; that is to say in whiche place of the firmament the mone being, maketh fulle see. Than awayte thou redily in what degree of the zodiak that the mone at that tyme is inne. Bringe furth than the labelle, and set the point therof in that 5 same cost that the mone maketh flo |