VARIATORVM. 165 



iic.it vnitatem affirmatiuam vel negatiuam pro vtroque 

 cafu defcenfus et afcenfus mobilis in curua , atque inde 

 elicitur ^^-Kdsi=:ciudu , exiftente udl~ds, 



2. Ducatur per b redula h^ parallela BG tangen- 

 ti BD occurrens in p , motusque in elemento curuae 

 B^ fpedari potcft tanquam compofitusmotibus ifocbro- 

 nis per tangentem B[3 et per lineolam (3/;, quorum hic 

 acceleratus eft potentia g , illc vero vniformis, quare 



(5. 7.) dt-VC^) vel anaIytice=zi/(^)=z,/.V/(^)=z: 



^ , vel uu—lt:^ Nam ^b inuenietur — ^^ • 



3. Diuidatur aequatio (N. I.) inuenta £^-R^j 

 rzzcv.idu per modo inuentam wwiz:^, reperietur ^'-^zz.^ 

 --gpr (^^^^ ^"i^ proportionalitas linearum BC(r), 'Eh[ds), 

 BD(^), ct Ee{di) praebet qdszzirdi)-^-^ (vel quia 

 -^dpzzadp:::igd'QTizzge-gE'\-g^-GTi—-di^dl , at- 

 que adeo ^/=:-^>-|-^/)-=:^-j-J^^5gl (aut fi ^ = 

 ^ flat=:^f )=z^-^-|-«f-^ , adeoque'^-z^4- 

 "?""If^ , quae per tranfpofitionem terminoium et pcr 

 multiplicationem cumfradlione^, mutetur in /^^/:/-4- 

 hidp-pudk—-rh^il (vcl propter R=^/r" et g=z:^3^) 



^ (dic;itur hoc) =r M.'fP , et habebimus 



^(^^)=:'l^';;^^^^P,etfumtisintegralibus^=^ 



X 3 vel 



