313 
C}'* 4-2^)+ 15 — V Aæ’^j (}/* 4-2“ ) — '-^Xxy 
(_y^ + 2i^)" -}- I ^ (Sin. P -f- 5 àn. 3p)4- 4(7Ar(Sin. 
écQ,) 4* (Sin* &c,) 4- (Sin. &c.) — 
(Sin. &c. ) — 5 XX (Sin. &c.) — lrfx(Sin. &c.) — 
J t?xx (Sin. &c. ) -i-iany (CoL &c. ) — faax^ (Sin. 
&c.) -{-îanxy (Cof. &c.) — (Sin. &c.) + 
la HZ' (Sm. &c.). 
Et æquacio tertia formæ fequentis. 
ddz 
j-^ 4 - A4- I *z — '^Xxz 4-* 6Ax® 2; — lAz (>^4- 
lÀf %> 
z^) — loAx'z 4- y ^ 4 " ) 4- isAx^z 
— V Ax^ Z (y 4“ ) + V A2J ()/' -\-Z^Y — Il Ax^s 
4- Ax^ Z {y'^-\-z^) — i^Ax2; {y^ 4- z^y 4 - 3^2 
Cof. P 4- 3 axz Cof P — 3ayz , Sin. p — 3 xz Cof t . 
— 3^x2j(Cof &c.) — 3axx2i(Cof &c.)4-3^â}'z 
( Cof &c. ). 
5. 12. 
Quivis alius tanta complicatione termino- 
rum variabilium eorumque differentialium , ac hæ 
involvunt æquationes, perterritus omnem ulterio- 
rem earumdem refolutionem fortaffis inter defide- 
randa reliquiffet. Difficultates autem analyfeos e- 
vincere longo annorum ftudio asfvetus, neque 
hoc in negotio fpem deferuit Dom. Evlerus. Pau- 
cis autem videamus qua ratione inceiîerat, redu- 
cendo ea quæ fuperfunt a nobis attendenda ad fe- 
quentia momenta. 
1:0 Aflumit quantitatem x per feriem infinitam 
cofinuum certorum angulorum ut p & ? utcunque 
combinatorum conflare; quantitatem y per fimilem 
VOL. IV. R r fe- 
