(19) 



/ 

 / 



fin./i/.v dxdxy 



X 



III. 



;ib a: rr o' 

 ad JT ~ I 



d x^ 



IV. 



coCpIx dxClxy 



X 



ab X 

 ad X 



o 

 I 







etc. 



Fer integrationem vero 

 'fm.plx d X 



/■ 



A 



I. 



ab .V nr o" 

 ^^ Lad X — i_ 



II 



=:/Vdp. 



II. 



y 



/ 

 / 



' I — cof. /) / .V 



3 .V 



ab AT ~ o 

 X {JxJ- L^^..5= I. 



=:fdpf?dp. 



III. 



p 1 X — fin. /) / .V 3 jf 



iiii 9ijBiS;j)f 



ab a: rz o' 



X il xy \jidx=: i_ 



IV. 



:=fdpfdpf?dp. 



\pp(lxy—i-^cofplx dx 



dx abjfrol • 

 jTc/T/ L'^djrz:iJ 



— f^Pf^Pf^Pf^dp. 



etc. 



Ilic manifeftum efl qiiantitatem / nega^iuam accipi non poffe, 

 <iuia alius iam ipGi fun6io P fieret ima^inaiia. 



C 2 



Ad- 



