qni crgo cafns manifcflo locum habere ncquit. Quemad- 

 n.oJuiTi autem hinc cafum cHcuimus, quo motus corpo- 

 ris fit ci cularis, ctiam opcrac pretium ciit in eos cafus 

 in^uircre, vbi mofus tantum quam minime, feu infinitc 

 parum a tirculari difcrcpat, 



Iniicfligatio caruum, 



qiiibus motus Lunac infinitc parum a circulari cHct 



dilcrcpaturus. 



§. 22. Qiiia motus proximc in circulo abfolui 

 dcbct, diftantia v fcmpcr qnam minimc a conftantc dif- 

 crepare debct, Ponaiur igitur v — a (i -]- a cof. z y\\ vbi 

 a fradioncm prac vnitate quam niinimam dcnotct, ita 

 Vt eius potenatcs tuto ncgligi queant. Kx ipfa cnim ac- 

 quationum forma faciic intcUigitur, partem iftam mini- 

 mam inuolucrc dcbcrc cofinum anguli zy]. Dcindc quia 

 ctiam motus proxime dcbct cfle vniformis, ftatuatur fi- 

 inili modo ^ zz: >i ( i -4- (3 cof. 2 >i ) , ita vt ctiam [3 fit 

 fradio quam minima. Hinc cum fit dy]—(i<P — d&f crit 



^; =: /7 (i 4- 13 cof. a Y)) - I, fiue ^;; zz « - I , 



Ob f3 fra(ftionem minimam. Ilis pofitis erit 



^J n — a a a (« — 1 ) fin. a ■>! et 



^=z- ^aaln- j)' cof. 2>j, 

 tum vcro habcbitur 



§. 23, His iam valoribus introdudis pro acqua- 

 tionc follcriorc habcbimus 



