CEKTRin^CA CORP. SPHAEniCT &c. 15$ 



crafii §. 7. ct 8. pro ;rr:i , fint in rationc mafTarum 

 U, T, K, ct dilbiiuiarumO//, O/, O/fe, lubcbitur: 



T. Ot =: T. Ok -+- T. ki 



V. Ou z=: U. Ot - U. w/- — V.Ok- T. ^/. Vndc 



T.Or-+-U.O//=r(T-i-U)0/(: = K.O/:. ' 



Patet porro, quod Cxhn mancnte granitate ipfius 

 rpliacrue, ct modo compofitionis, diuerla fit vis cen- 

 trifugac diffcrentia a ti fphaerdc homogcncae pro 

 diuerla globi a ccntro vorticis dillantia, quia c in- 

 grcditnr fi^^rmnhim vis centrifiigac: quod etiam di- 

 uerfii fit in cadcm diflantia pro difFerentia grauitatis 

 in Ytroqwc heniibphacrio, quoniam / ingreditur ia 

 eandcm rorrmihim : quod denique magis magisque 

 diuerfiifit, prout fcgmcnta fphacram componcntia 

 fnnt magis inaequalia vohimine ct denfitate. Facilc 

 inucniri potcrt pnncflum in quod colligi debcret tota 

 fphacrc maffa, vt cadcm prodeat quantitas vis cen- 

 trifiigae , quac in hctcrogcnca obtinct. PolTet id 

 vocari ccntrum virium ccntrahum. Dcniquc ctiam 

 illud oculis patct , pro diuerfa vorticis lcgc nunc 

 maiorcm efle vim fphaerac compofitae, nunc mino-' 

 rcm, quam eft in homogcnea. 



SchoIIum. 



§. 15. Ncmini non obuium crlt , plurima 

 pcr hafi:e formulasProblcmata non dilficultcr rcfol- 

 iii , prout vnam vel altcram ex literis formulam 

 ■componcntibus pro incognita aflrumferib. Sola n, 

 quae lcgcs vorticiji cxponit, difficulratcs compledi- 



V a. tur, 



