== (214) == 



^ + .-:7^ + 3-^ + .-^ + ^^^-==^^' 

 etc. etc. 



confcquenter 



2( + j!. 4-1 + 5 + etc. =: / 1 + / J + / 1 -+- ; ,^ -t- ctc. 



Q. E. D. 



Lemma III. 



§. 14. lisdem pofitis erit 



^-+-S:-i-©-He-(- etc. = i — / 2 , 

 ideoqne qnantitas fiiiita^ vnitate adeo minor. 



Demonftratio 



Colledis tcrminis fibi inuicem fubfcriptls In vnam fum- 

 mam crit : 



S3 H- ^ -*- 2) -+- ctc. = 



etc. 

 Notum autem cft cfle 



i+i + ^ + r3-^-/*-Hctc. 3==, 

 ^-^-3 + r'-^^ + 3^ + etc. ~l, 

 H-3-H^-l-}-3-^H-f, + e<c. — \, 

 J+r-f-,^4-^-^-H-\-f-etc. = U 



etc. etc. vnde 



