->^.o ) 3 50 ( %'4<^ 



Si dcnominationcs fiipra adhibitae rctlneantiir, fe- 

 niiaxis antcm coniiing:uus oibitae per / indieitctur , erit 

 vti ex dodrina Scdionum Conicarum conllat: b-jV (i — f'), 

 Quum igitur fupra §. 15. inucncrimus: 



ccoi.(P — i'coj.^' — " — J '^ \*^ c ; ti t. — cc3j.;p_c'co/.(f' » 



crit quadratis vtrinque fumtis: 



c' c" ( cof. (J) - ccf (^'y=J'{c cof. (p - c' cof Cl:' y-p ( <:'_<.-)» 

 quae acquatio euolutione fada ita erit comparata: 

 'J^' ( cof Cp' - 2 cof (p cof Cp' H- cof C-" ) 



n -i-^ft'( i-cof.(^'coi.(p)-c'fin.(p'-c'*fin.<^i% 

 vndc itcrum iflliaec dcducitur, 



2 ( I - il ) ( I -cof. 4)cof.(ti')- ( I -r, } nn.Cp- 

 - ( I - ^^; ) fin. (p" =z o. 



Si igitur vti in antcccdcntibus , ftatuatur (p' -\- <P ■= t ct 

 (p'-^(p — ^ , fict 



2 cof CP cof (^' — cof 5 + cof e , tumquc 



a fin. CP' — I — cof e cof 5 — fm. e fin. d ; 



2 fin. C})'' :3 I — cof e cof 5 -j- fin. e fin. 5, 



his igitur valoribus fubflitutis noflra aequatio in fcqncn- 



tcm iibibit: 



2(i — ^^-';)(2 — cof (J-cof £) — (i — [^)(i— cofecof.5— fin.efinS) 



(i — --[* j ( I — cof c cof 5 -I- fin. e fin. 5) — o , 



quac ctiam fcqucnti modo rcpracftntari potcft : 



czf'{ -', - ,;, ) fin. c fin. 5 + 2 (i - /^'J ( I - cof 5) (i - cof t) 



_(i_/l)(x_cof£Cof 5)-(i-i;-)(i-cofecofc^) 



+ 2(i-.-^)(x-cof€Cof<J), 



vudc 



