Opuscula t 215 
d<p d (p^ '— d (pSh .^^ _^ d (p C h ■ <p d ip S i . <p ^ 
S h TpC h . f. "~ Sh.(pCh.<p Sh.<p Ch.<p ' 
d(pCh.(p:=.rdSh.(py dSh.(p^rdCh.p: ergo 
d<p rdSh rdCh .<p p . , a i 
— - — ■ = —^. prr i & mteerando , laaa loga- 
Sh .(pCh .<p Sh.<p Ch.<p ' o ^ 
rithmici fyftematis fubtangente = ^ , fiet S = 
ISh.p — ICh.(pf quam fi dividas per ^ habebi-s 
dp ISh.p — lCh .9 
Sh.<pCh.<p ^2 
Venio ad aliam 7; — ^ J — ^ , in qua pi'o fubf^itue 
S c . <h C c . t> ^ ^ 
2 ■ 2 ^ 
Cc.p -\-Sc.(p , ut obtineas 
r^ d f d <p C c. <p -\- d (p S c . <p^ d (p C c . <p d <p S c . <p 
S c. <pCc S c .cp C c .(p S c .9 C c .<p ' 
dO}Cc.(p = rdSc.<pi d p S c . (p = — • rdCc.cp; ergo 
d<p r d S c . <p r d C c . ^ 
s77,T7r,'=^-s7-, cTTT' ^"''^ mtegratio-^ 
o T -r s o <P lSc,.<p — l C c . <^ 
ne , & divifione per , S ^ — = ; — — . 
S c . p C c . <p ^ 
Quae a me in hifce litreris expofita funt , tibi referenda 
elTe cenfeo ; namque ad ea fortalTe non advertilTem , nifi tuis 
nie petitionibus excitaffes . Itaque hac de caufTa inventa ifta » 
qualiacumque fmt , gratiora tibi efle debent , Vaie . 
"Bononm quinto Kal, Martii 1^6^. 
GUS- 
