Siimatur igitur c~<na^ vt numerator etiam pcr a ct fiat 

 diiiifibilis , critque formula noftra 



cuius denominator certe nullum habet fadorem realem , 

 nifi fit j3 ~ Y? qncm cafum autcm ipfa rei natura refpuit. 

 Hoc autem valore pro n aflumto confequimur (latim 



,, dn a (8 -*- y) — 1 a p £f 



" — ~Tp — tti (3 — (i ■)•-*- 7 'V— (ii-H-yj p-+-ppj^ 



, * » _ n -^ -g ((3 3-!37-77'-^;^ (?+y) P-zapp 



l^pu 11 — (Jip— li>-+-7>— (t^-H>j p-Hpp;- * 



$. 3-a. Vt iam hinc cufpides definiamus, pro pjri- 

 ma cufpide ponamus p — oo, eritque tam /~o, quam 

 « — o. ^ro fecunda cufpide fumamus p — ^^ eritque ab- 



fciflk ' '"'-: 



Pro tertia vcro cuipide fiat p — y , ct erit 



Tab. II. Hinc in figura crit G B - ^^zzyys ' 



Ati — ■ (p_^3j ct ±iu_j^^2r^,. 



§. 31. Du(fli« iam chordis A B,' AC et BC erit 



AB-r^^-^. V T^P - v)' -V- 1 c f 

 ' AGzTp^^y, y(p-i^y)^^i. 

 Pro tcrtia chorda B C cum fit 



B C zz (B G-f H C)^4- G H' r i±£r^_i^^ + vi! 

 hinc erit ^ 



ficque tres iftae chordae AB, AG tt BC eandem inter 



fe 



