IN CORPORA SVBIECTA, aij 



qae rcdiici potcft ad hanc pirmam : 



G ,1 Qdpdr{i-pp) Gdr 



dxii-^-ppy r prre/x{i+pp) pr'dxVi-\-pp 



Qdp Qdp 



2 rrdx{ r -^-ppf dx{ i -\-ppf 

 Quia autem cft 



rzz — ^^ '--i-^ erit 



dp 



^p^^ dx(r+pp j_ 



quo valore loco dp vbique fubftituto prodibit 



TJ — — 5 ; d d ' — Gt^^c^ — PP ) Ls. c . 1 c_ 



§. 12. Ponamus autem hic curuam noftram 

 AYB efle circulum, cuius radius — ^, ita vt ha- 

 bcamus r—c ideoque </ r :z: o, fietque n = + -^^j + ^, 

 quae cum fit quantitas confians , fr ponatur 

 n — ; - , fiet vt fupra integrando /11 d x rz *^ et 

 /n dy — ^ ^ quibus valoribus in aequatione 



— pfW-d y -iWdx -\-^ — Q> 



fubaitutis fit - ?^ - '^-i? -^ M n o , vbi' curti' flt 



c, c ' 



ob circulum y-^zicx-xx) ideoque dr^--'=^ 

 erit — C + iM =: o , ideoque prorfus vt fiipra G — M', 

 itii Vf elaftlcitas hoc cafu nihil plane mutare vide- 

 deatur in prelTione. Verum pro acquatione' prin- 

 cipali hrnc proiiiret 



- /'^iV'/ n 'dy^-' pdrf n 4 'x -h M a/' 12? o i ' 



R r 2 cum 



