( ioj <5 ) 
&c. a = B4, i = Vj, c = Fz', d = H, &c. 
Vel fine As=za,, A6 — {^t Aj~y, A^z=S^, &c. 
A4 = x. As = h, Az=.fA, Az=, p, &c. Deinde erunc 
zA =: (X, -\- X., zB z=: ^ a, — X zC y — g /3 
4- xa -V" — 3^ + zD=S^ — Sy-^ 9 ^— 5 ‘^ — 
9^ — Sf^ Et<t = a — X, h z=z^ — 3‘*’~h 
356 — A, f == y — 5 | 3 -|- lOa — IOJC-I-5A — fAi, dz=i 
^ — 7-y + X I|8 — 3 ^cc -i- 3 5jt — II A + 7/A &C. 
Et fit 0 pundlum medium inter ^4, -^5, atque appel- 
letur OP, zi eritquc Ordinaca 
“ 7 “ ^177 ' 
5 C- 4 -c^ 4^^— I ■ 
4* > • 3 4 • 5 ' 
7 Q 4 ^^— I ^KK —9 ^ AKK—^S t 
4’ 6.7"^ 
9E+3^ ^ 4H=9 X ,< ^ S =*2 + & C . 
4+ 2.3 4-5 6.7 8.9 ' 
In hifee duobus etiam cafibus z eft negativa, quando 
Ordinata P ^ cadit ad alceras partes inicii Abfcifc 
Ec in omnibus tribus cafibus diftantia communis Or- 
dinatarum ponituc unitas, 
Omnes tres cafus demonftrantur facillime per calcu- 
lum. In cafu primo pro F^feribo fucceflive a, / 3 , q<-, 
g, &c. & pro z interea p, i, x, 3, 4, &c. quse funt 
longitudines Abftiffie ordine fequentes ; & provenient 
sequationes 
€ zz:. A -]f 4^ H“ 4 ^ " 1 “ 
/3 — a 
