^6 DE ORBITARJ'M APPARENTllS. 



14. S\d>a; valorcs EC— ^j— , CF = p|~, 

 EF=p^f|hi, NM==^i manent, vt in §. §. 

 8.9. ct omnes pofitini fnnt , ftquidem c^>a, *"*>£ > 

 adcoquc rd^ae , rV*2>«V. Igittir tantummodo exa- 

 roinare reftat , quisnam ex axibus NM,EF, fit maior, 

 quis minor. In §. 9 inuenta eft ratio N M : 

 EF — V /^ 2 — «'/ : j^ ; quare difpicere debemus , quae- 

 nam cx quantitatibus Vr t d'—a'e x , sd, altera maior fit. 

 Hoc facilius fieri potcrit , fi , ob r*=j*-W* , loco <_•• 

 fubftituamus r*— j* , vt fiat VrY- *V=VrV-«V-+-«V 

 lam ob dp>a, vel d^a 1 fiet rf*(r*— /)^>tf*(r"— j*^ fcu 

 r*d*— J V* *> «V— «V , quarc iubtrahcndo maiorcm et mi- 

 norem quantitatem ab cadcm rV , fict rV— r x d*-\-s*d* 

 <^r'd'—a , /-+-a t s t , lioc cft j*</*<£rV— ar-\-as* fcu 

 j</ < V ( rV-«*r*-HzY ) ; \11dc in hoc cafu erit N M axis 

 maior , EF minor. 



15. Si </=*, fient EC(=;£jh:) = £:, CF 



r osd ^ O t j-. 17 / :Orid J \ :OI'S "■ — — 



l - — rd^ce J — r-f-c > ^ ** — l r*d*— c*c* J — r* — c* > e ^ 



(ob r*-tf*=j*j= ^ , N M(= 7=™ )= --~ = 

 —. Hoc crgo cafu , ob NM ~ EF , orbita apparebit 

 inftar circuli , cuius radius — ^ r , ccntrum vcro diucr- 

 fum crit a ccntro orbitac C , qucmadmodum EC diffcrt 

 a CF. 



16. Si </<*, valcKtsECzz^, CF = ^ 



EF= r »ri»-«»c» > NMr =y^_..;r* niancnt, * in §« §• 

 8. 9, qui vero mutationes quasdam patientur, prout rd 

 vel^>\clzrvcl<^<7c.*. Scd independenter ab his condi- 



tio- 



