VERO ET APPAREN TL $6j 



_4. Quoniam conftructio curuae a M (3 ita T. XXIV. 

 perficitur, vt du&o per Z quocunque arcu circuli Fl ^ 7 * 

 maximi , qui circulos minores ALB, <*/_ in L et 

 / interfecat , arcus interceptus L / bifecetur in pun- 

 c*to M , quod continuo reperietur in curust a M (3 ;; 

 iam ornnino operae pretium erit inueftigare , tum 

 polum p circuli minoris alb fiue quantitatem arcus 

 P p, cum etiam arcum pa feu diftantiam poli p a 

 circulo minori a l b. Eft vero ex proprietatibus 

 parallaxeos : 



Tang.Aazz^-^^-^A. et Tang. B Szz Jj-^ffi- ? »'. , 



° i — sJin.TT co/.ZA ° ~ i-g/jn.irco/.ZB * 



vbi breuitatis gratia pro e fin. 7r fcribamus y , et 

 quum fit. 



pa—FA-\-?p-{-Aas tumque p£__:PA— Pp+B_> 

 obtinebimus. 



^^FA-K(Atf+B£)__:FA-t-AcH-Bp*, nec nora 



Pp = _(B&--Ac}::__.B{3;- A et. 



Gbnfequemur proinda 



Tan? ( B fl J- A tt) — _ y/ fegirft— y^cgAy-ikTjriugACr— 7«/. gB) 



* «u 6 , v _/ j_, -p- xv v.j _ _ Y(co/..Z.A_»-Co/.ZB^- + - < y I (co/.Z-ACo/.Z B-/m.Z_/M.ZB. 



fiue 



Tan? (R ff-4-. A ctY — * iy - r "" T> A (c0 ^ p r ~ y e 5£2M 



5 " ^ r?'^****-^ , — 2 -yco/..p aco/.pz .-fTyMc^.PA? — /in.PA 5 ! 



tumque 



Tang. p«_T a ng. (PA+B^A^-r^^^.—. 



Similiter fiet 



Tn n? P/)— Tan p- f TC fl A » > — jrflnxv^ —yco j.Zky— yfin.Tm—yc oj. zn) 



-115.-^ — *H5.v_»p-tt* ? — ,-'y;co/.ZA-i-co/.ZB;-Hy z (co/ZAco/.ZB^-/m.ZA/w.ZS) 



— a •V//n. P Z (cof. P A — 7 co /. P Z) 



*"" • — * y coj. p z co/. p a -#~«y? (co/. P Z? — /m. P l 2 )* 



Vel 



