->i4e ) 332 ( ^?i<- 



§. 6,7. Pro excentricitate g ct anoraalia Tera u> 

 GoniiiiKftim confideremus has formulas:" 



g fin. 0) r= K 'i; "j ^ et g cof. oj — -1;' ^' — i , 

 quarum differcntialia pcr d diiiifa dabunt: 



T dg jin.U} -+- gdttiCoj.(ji ^ uvv J i ; _i i uv ^dv i a D^ dii 

 *• d « — cO "^ 5 9 "1 i('l ' 



TT dgco/.ti) — gdcj/in.cj — z-D^gdg i _ ? x> -o g g <i f 



Hic igitur loco ^, j-| et ^-^, valores fiipra afllgnati fub- 

 Hituantur, ac peruenietur ad has duas acquationes: 



II. iUSLJii^JAJ^IilLli -zuvv^-uvv^^, 

 quae aequationcs ob 



v' t,' — ^ — g ^ cof. oj et u vv ^ ^ =: g ^ Cm. (ii 

 abemu in has: 



I. dj.(tn.^_:^r^gji^jof^ — nuv + mvv^ + g^ cof. w. 



II. lUilig-g.'^^-^'-'.-^ — a « V •:; ^ - g ^ fin. w. 



4. <j8- latn prior harum aequationnm diicra io 

 fin. w pofterior vero in cof. w inuiccmque additae dabunt 

 hanc aequationem : 



^ ^ mvv^Cw.iti -4- «'^' («fin. 0) + i-v^coC. co), 



Tnde itcrum patet, fi vires pcituibatrices effent nullae > 

 tum excentricitatem g mauerc coiiiUntem, prorfus vti rei 

 natura poftulat. Deiti vero fi faci.^mus I. co(. u — II. fin.(*i, 

 prodibit 



€^ — w/ -p c" ^ cof. (ji + nv '^ti cof (D — 2-1; ^ fin, w) + ^ ^. 



Vndc 



