6i Investigatio perturbationum 



evancfcerec , hi valores commodius & fuccin&ius ita ex- 

 primercntur 



Deindc vero eft : 



g + k (g-k-h)cofv 



i r i l i i n/i S co f-(* — *) 



N== l cof ^+< fj< r<rg *>/>* +T*(g *[* )-.W(.+v) 



\o"cO 



f> 



Attendenti autem mox patebit hanc excentricitatem e 

 fine errore fenfibili negligi poflc, unde his poftremis for- 

 mulis ucemur. 



§. LXXXIII. His jam valoribus pro M & N inventis 

 ipfa differentialia quibus perturbationes concinentur ad 

 formam defideratam reducere poterimus. Quod igitur 

 primum ad variabilicatem femiparametri p atcinet, quo- 

 niam invenimus dp = — 2 n Max d uv' ap in hac 

 expreflione ob n minima loco p ejus valorem medium b 

 & loco x valorem b ( 1 -+- k cof. v) fcribcre licebit , 

 unde fit : 



dp = — znab da>. Af ( 1 -»- £ cof. v)V ab> feu 

 iT = — z n a V a b. M (3 •+- k cof. v) d a>. 

 Gum autem pofuerimus aV a =i by/ b, eric —  = — 

 2 n i b b Md a ( i -+- k cof. v ) ; hincquc pro M valorem 

 inventum fubftkuendo 



