( ) 
^gula Septima. 
Ducatur (in Fig. /S a femidrculum cc(ly con- 
tingens in / 3 , & producatur ad duda^j^/^. Sic 
autem curva (in Fig, 13.) K L ejus iiaturse, ut area 
M n W P — fit fedori ^ ^v. Didis igitur m n, ; n z, 
c ; & tangente arcus p q, R ; erit n v P $ =: 
aa c F 
“ Sa — decimus problema folvendi 
modus. 
Quando anguJus interfedionis redus eft, 8 c c=i 
hsEc regula lub formula pofteriori regulte fecundse com* 
. prehenditur. 
Item ft loco }ils/l (jL linea reda fumatur, quicunque 
fit interfedionis angulus, cafus ille curvse logarithmi- 
C2e invenietur, quern in regula fecundi tradidimus, 
^gula OBaVa.. 
Ut antea, eft area curv£e,.cujus abfcifta .s &ordinata‘ 
— , sequalis areas curvas, cujus abfcifTa eft 
aac~{- 
Hie autem eft unde^ 
R Sc ordinata — x ^ 
R aa — cR 
cimus modus problema exequendi. 
Literis m, n iifdem denotantibus, ut antea, fit 
z 
¥ 
m — n 
Z, c$ U C ^ <!?'R 
R « X a"' — cc RKl^ ; Sc ordinata -7 x 
I ’ R aa — cR 
m — n 
ftet=;R » X ^ xR + ^^^’K.'R 
X a 
