Another maner of werkinge, by _vmbra versa._ Yif so be that thou may nat come to the bas of the tour, I see him thorw the nombre of 1; I sette ther a prikke at my fote; than go I neer to the tour, and I see him thorw at the poynt of 2, and there I sette a-nother prikke; and I beholde how 1 hath him to 12, and ther 5 finde I that it hath him twelfe sythes; than beholde I how 2 hath him to 12, and thou shalt finde it sexe sythes; than thou shalt finde that as 12 above 6 is the numbre of 6, right so is the space between thy two prikkes the space of 6 tymes thyn altitude. And note, that at the ferste altitude of 1, thou settest a prikke; and 10 afterward, whan thou seest him at 2, ther thou settest an-other prikke; than thou findest between two prikkys 60 feet; than thou shalt finde that 10 is the 6-party of 60. And then is 10 feet the altitude of the tour. For other poyntis, yif it fille in _umbra versa_, as thus: I sette caas it fill upon 2, and at the secunde upon 3; 15 than schalt thou finde that 2 is 6 partyes of 12; and 3 is 4 partyes of 12; than passeth 6 4, by nombre of 2; so is the space between two prikkes twyes the heyghte of the tour. And yif the differens were thryes, than shulde it be three tymes; and thus mayst thou werke fro 2 to 12; and yif it be 4, 4 tymes; or 5, 5 tymes; _et sic 20 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.]