OpascuLA 
i 
y . ( S h ^ +C h . ^ 9 —r^i five 
% 4 
^.(riiSh q + 5Sh.^qp .Ch.^^pq;: 
lo S h .^q: .Ch.^q: + lo S h f f .C h . 
5I5Sh.^^.Ch.f;p-!-Ch.fr/)=:r^ 
7 .(^^S h.^(|)+G h.f9.(— Sh.fcp4-Ch.^(p 
= 5 five 
j . (il: C h . ^ 3 S h . ^ qj^. c h . f 9 
-3 . 
2 Sh.f^.Ch.^cp +2Sh.^cp. Ch.^^i 
■ 4 . y 
gSh.f^.Ch.^cpH-Ch.^c^ )r=^J 
y . (^iS h f (|3 — u h.^ .( — S h.^fp + C h. f 9 
' , five 
I 
_)f .( m S h.f 9 S h.^(iD Ch.^ 
2 Sh.f (p .Ch.^;]3 — 2 S h . ^ .C h . ^ ^ 
4 5 
1 Sh.fq3.Ch.^q5-}-Ch.^fp)=:rJ 
qux tubula quomodo ad altiores poceltaces produci debeat, 
cuique manifedum eft . 
XIII. Poftquam invenimus formam , qua in cafibus fin- 
guh's prasditac funt fummatorix requifitac , uc vitetur prolixi- 
tas calculorum , ad quos nos ducit methodus hadenus ufur* 
pata,opportunum erit vocare in auxilium methodum coeffi- 
cientium indeterminatorum . Loquamur prius de finibus & cofi- 
nibus circularibus . Suppone itaque cujufcumque differentialis 
I m—n ^ m 
yd(^,Sc.qq) ,Cc,q(p summatoriam elTe jy . ( ^ S (p 
H-^Sc.^cp oCc,qcp-\-A''^c.q(p . Cc.^(pH- 
A''Sc.q(p ,Cc.q(p &c. donec devcniamus ad terminum, 
ubi Cc,q(p pracditus e/l esponente = ra. Hujus fuppofirx 
fummx cape dilferentiam ; qu:^ refultat formula, compara 
cum propofita. Tot obtinebis xquationes, quot funt coef- 
ficien- 
