EIVSQVE VARIATIONE. 14.1 



XXIV. Si omnis perturbatio abeflfet , foret 

 ob excentricitatem euanefcentem , vti vidimus , x~i 

 et jj = « hincque j-|- = » — 1. Nunc perturba* 

 tione accedente ftatuamus : 



*=i4-P_i-Q-f-R et jf- = n-\-p-\-q-\-r 



hincque j%—n-i-{-p-\-q-\-r, vbi P, Q, R et p, 

 q, r feries maxime decrefcentes referant , cum ferie- 

 bus fuperioribus ex perturbatione natis comparandas 

 ac has ipfas quantitates tanquam funcliones anguli 

 vj fpectemus , fiquidem nouimus omnes inaequalita- 

 tes ab hoc folo angulo pendere. Erit ergo dxzz.d? 



-\-dQ-\-dR et per •$=(»- i)-r-/>-r-f 4- r multi- 

 plicando : 



Jf = tfn-i)d?+(n-i)d<l-t.(n~i}dR: 



-\-pd? -\- pdq^ idy^ 

 -+- qd? 



I- 



quae forma differentiata fumto iam elemento di[ 

 conftante dabit 



*gr= \(n-i)dd?-^(n-i)ddQ-^(n-i)ddRl 

 -\-pdd? -\- pddQ} 



d? dp-\- dpdQh.dy 

 -\-qdd? I 



S 3 muld- 



