AD DVO CENTRA ATTRACTI. iSj 



hincqiic porro : 



Cfi-wT^-f-aDwn 

 l-ftUi K = -— -r ^ H^ 



A[i-f-n) ' 



wH_H_ ■ w A(C^ i^n)-2 T)n) x_ 

 ^^^"^lC ~ C^i-«rt)+2D««"'H 

 _ ««HH wC H H _ m{C'zT » 



55. His iam valoribus definitis aequationis 

 lioftrae prinnae ^ — ^' aequatio integralis comple- 

 tx ert: 

 E4- sFrj+Gmy-f 2H r + j) -f 2 Irj (r+J-) -l-K (rr+J-f) =» 



in qua littepa n eft conftans per intcg.ratiouein in- 



grefla. 



Deinde vcro eft ; 



— Tt —Vr — H -t-R . ~Ilf— 7 ; -H - S 



J — O» r-+-2l/ -+-K ^" ^" C JJ-J-2lt-t-K 



•rndc habemus : 



R = Grri-+aIr/+Kj'-fIrr + Fr4-H ct 

 S=-Gr/J-2lrx-Kr-Ixx-F/-H 



tum cnim aequatio noftra difllerentiata dat ; 



ids. K—zdr. S — o feu ^ — T > 



quae crat prima aequatio in §. 4-3. integranda. 



55. Cum 



