166 D E M T V 



(i+k-z)(z-i-\-k)-=:-~( i - fc Jfc) ~\r * z~zz 

 debebit efTe fa&or quantitatis poft fignum radicaie confti- 

 tutae , altero factore exiftente E E , vnde oritur 

 ^jr= . E E v et H b.= E E(i-aj;, 

 fietqueV(-EEs^-}- 2 ^^-F^^)r=:El/(i4^-5r)^ 

 (*- i + &)=r;E> / [U~(s- i )*]; Ergo, obEz= 



-/ C a* 6 



V — , ent 



^ ~ bbd z "^VHr " 



^^P^ v"c ** — (« — oH 

 Quia s — i H- £ tft maximus , et 2 zr i - £ minimus 

 valor , quilibet medius ita exprimetur commode z zz 

 i+i: cof. j, eritque V [££-(£ - i /] =r. fcfin. s, et d z 

 S2 - kd stin. s : vnde flt 



(i -fkcot.j ) 



atque ^ ri — 7 ^r c ^~ s — J hincque (J) = D -f- j. 

 Quia angulus A C M rr $> , capi ftur angulus A C P 

 zr quantitati conftanti D , eritque angulus PCMzj; 

 qui qualis fit refpecftu orbitae ex diftantia x~— x ^ k co/> s 

 colligi poterit. Nam fi fit s m o , quo cafu C [VI abit 



in C P , erit C P zz ,-^-j ; erit ergo P id orbitae pun- 

 dtum , \bi corpus minime a punfto C diftat , ideoque 

 cft abfts ima , feu perihelium , fi C fit fol. Cum igitur 

 diftantia minima fit — p^ , et prodeat , fi j =: o ; di- 

 ftantia maxima prodibit ponendo izz i8o° 5 fitque zr 

 p^T| j f 1C( l u e diftantiae minimae e diametro erit oppofita : 



vnde 



