rERTVRBEWR ACCVRATWS INQVIRlTFR 43 ^ 



At cum fit x—zcoC^p et >/— ^fin.Cp erit : 



ddx—ddzcoi:(p-2 azd(Pdn.(p-zdd(pnn. (Jj-sj^CpVoi.CJ) 

 ddj — ddzCm.^p-^zdzd^pcoi.^p-i-zdd^PcoC $-.2^(p'fin. <p 

 qui valores in aequationibus illis (ubftituti dabunt : 

 ddzco(.<p'-2dzd(pCm.(p-zdd(p(:m.(p-zd(p'coi:.(p--"-^{^\ 



' i ee 



<f//sfin.(I>+2<3^s^CpcofC|)-i-^</^CpcofCl)-s^Cl)YinCpi-^(^\ 



Ex his ergo duabiis aequationibus definiri debet relatio 

 inter tres quantitates variabiles 5; , Cj) et ^ quoniam a 

 / pendens alfumimus. 



§. ^. Harum aequationum imientarum prior multi- 

 plicetur per fin. Cp , pofterior vero per cof <$> , haecque 

 ab illa fubtrahatur quo fido prodibit : 



-2dzd(p-zdd(p - ^'•^f^V;"^ 



eft enim fin.(OH-Cp) cof C|)-cof (0-J-Cl))fin C^irzfin. ^. 

 Deindc quia eft cof 0-i-Cl))cofCl)-|-fin.(0-|-Cp)iin.Cp=rcof ^, 

 fi aequatio prior per cofCj) pofterior vero per fin.Cj) mui- 

 tiplicetur ambaeque inuicem addantur, reperitur. 



ddz-zd(p zr- -rr ( ^-^-H -^r ) 

 Ponatur nunc breuitatis gratia f^^ —m \ denotante c di- 

 ftantiam mediam terrae a fole feu potius femilatus re- 

 ftum , quod ob excentricitatem valde paruam a diftantia 

 media non multum difcrepabit , erit ob Siri^, »/~^ 

 — 0,0004.08587. Deinde fit ^=:«, et , fi |^ rr ,', 

 atque e—6or reperietur ?i=io, 0000057P, ita vt fit, 

 Tom. I. Ijj nz:^ 



