Opuscula. ^ll 
h \ 2. r r 
^ k ' ir ^ y ^ 
k 
Quoniam x ^e-+'S~-^z^'Scs^^^ inveni^mus 
— ^ 
k " a r 2 r ' 
Ad deterniinandam velocitatem corporis , inveniatur pri' 
mum differentiando valor ^z>, qui elt hujurmodi 
, — £f —t 
dzz=:jJSc.^-BJCc.Il.{^) - r r_^.^3c-iI~i^Cc.-ii.(— 
%r xr r 2,rr 2. r zr^ ^ ^ ^ 
l^i!Cc.-^-|-^— Sc.-ii -g^ 
{ivtdz^ .(-^) -rr = ergo 
^ {T B dt ^ at ^ J dt „ t 
lAll c c ^Al s c . X! 
% r r -L r ^ r r r 
_ — S t 
C -"-ll^^C-tp: ergo 
d s ds dt ° 
1 r r z r z r r z r ^ 
Reliquus eft ultimus cafus , qui compleditur tum poten- 
tias repelientes , tum potentias attrahentes, quum ^ > ^r. 
g t q t 
Quoniam iii hoc cafu rp =: C h . . ( ) T77 , & ~ S h . — 
* ( r ) ^'''■5 invenienda erunt integralia fequentium formu- 
iarum diiferentialium ///Ch.-l-'. (— ) ^»-^, S h . — 
i, J± 
* ^-7-) ^*''' j qux erunt hujufmodi 2ff 
