== (1(5+) = 



§. 31« Ciim iam porro fit D Cb r= D --j — 3 z= "Hiif , 

 "^^ rrTT == v^a^i;x - ) ' '^"'"^ diffcrciuialc pracbet 



* a/}/r 



•^ (;/-f-i'v/ 



qiiod diiiifiim rcr d t i/ T d:it ^^^ = '- , vnde collici- 



tiir tcnfio — ""-!. 1 , quac crco iiiitio dcbiiit cfTe iii- 



finite magna, dcliinc vcro coniinuo valde dccrcfcit ct mox 

 \ix rciifibilis cuadit. 



§. 32. Examincmus iam ctiam rtatum initialcm , \bi 

 fuif'*^ aniimimus c — o ct ^ = o , pro quo i^itur fucrant cc- 

 lcritates — zz:^, exilkntc 1' zr o ; tum vcro "** — —, atquc 



porro ^ = o , ita vt ip(b initio motus gyratorius fucrit nul- 



lus. Practcrca vcro pro loco ccntri cylindri C initio crat ab- 

 fciiTa A P — .V — o , applicara vcro P M ~^ — <?. At vero 

 huius pundi C cclcritatcs rcrcricnrur '^*- — o et -^ - a V T ; 



Tndc patct , ccntrum grauitatis C hac cclcritatc fccundum di- 

 rcclioncm applicatac furliim fuillc promotum. 



§. 33. Vt iam liinc continuationcm motus initio im- 

 prcfTi inucftigcmus, (ibfcrucmus primo cx accpiarionc / >/ F zz; 

 Y ti (ri -\- 1' ^' ) — n (cqui c — LLLL-^^-^iLilJr • ^ndc patct , fuc- 



ceffu tcmporis quantitatcm c continuo crcfccrc. Imicnta an- 

 tcm pro quolibct tcn<porc quantitatc r, vndc fit dillantia C) T 

 zzi c ~ fl r, angulus () T — innotcfcct cx hac acquationc: 

 C r: •/ ;/ X A tang. -- ; vndc dilumus fucccllu tcmporis ctiam an- 



gnlnm $ continuo crefccrc , non vcro in infinitum, fcd vsque 

 ad cctrnm tcrminum. Sumro cnim crzoo, quod c'apfo quo- 

 qiic tcmpoic infiuito cucnirc dcbcrct , prodit illc angnlus 



