Simili modo cum fit 



y-i s cof. Ct) -t- f fin. (J) , erit 



^y:=rdscof.(p-sd(pCin.(p-{-cd(pcoC.(^ et 

 </<// — </^j cof. (p - 2 </ j ^(p fin. Cp - /fl' ./4) fin. 

 - j ^Cj)" cof.Cp +^^^Cpcor.Cl)- ^r^CpMn.Cp. 



Quia autem hae formulae nimis funt complicatae , quam 

 vt in aequationes noftras priores eas induci confultum 

 eflet, per certas combinationes hinc concinniores formu- 

 las deriuemus; ac primo quidem erit 



d d X C\n. (P -{■ d (/j cof. CP - d d s - s d (^^ -\- c d d (P, 

 fimilique modo altera combinatio dabit 



</</A'cof.Cp-^</fin.Cp:=: zds d(p + S(fd(p-\-C(f(p\ 



§. 7. Pari vero modo binae aequatlones priores 

 inter fe combinentur, ac prior combinatio dabit 

 md±xfin^ddycof.^) _ jyi fin. cp _ X n, 



altera vero combinatio producet 



M (</^A-cof. cP-^^/jfin. Cp) — Mcof. Cp-n. 

 Quodfi ergo in his aequationibus valores ante inuentos 

 fubfiituamus , binae aequationes priores in formas abibunt 

 fequentes: 



j^ Mdds.-M»d0'-t-M£££g. — M fin. Ct) - X n; 



11. 'Md?da^^M;dd<r-4-Mc dCD^ _ lyj j,q(; (t) — IT; 

 quibus adiungi opportet tertiam iam ante inuentam 



A^a Acad. Imp. Sc. lom. VI. P. L Q §, 8. 



