ftantia d fuum pcragentis gyrum, fivc r : i - ^~ 



« DtVd D+d±VzD .D-hd - 



.__ & j- = — — = ~ ~ ) ^ 



'tVd TVa' D - d 



D-^d±V2D.D'-\-d /^Zjflil^ - 

 ^'^=—--^^7^ \ Dt J 



. I I qu. prox. (Nam diftantia d 



fempcr erit valde exigua , ratione diftantiae D). Hinc 

 d = (i + V2)\^J» qu.pr.;& fihic valor loco 



D-^d±V/^D.D-\-d 



ipfius d fubftituatur in ^^ , 



^ U — d 



adhuc propius eius valor obtinetur , donec iterata 

 fubftitutione, fi opus fit, ambae xquacionis panes 

 fibi invicem ^quentur , & verus valor ipfius d in- 

 veniatur. 



Sic fi de Satellitio Jovis quxftio fuerit, data 

 funt, per Elementa Aftronomis, diftantia Jovis a 

 Sole, five D =11488.788 femidiametris Jovis, cu- 

 jus numeri Logarithmus = 4,0602742, & ipfius 

 TempusPeriodicum 7=374336831" minutis fecun. 

 dis, cujus Logarithmus = 8-5732525; Datur quo- 

 que diftantia Quarti Satellitis =(7 = 26,630 femid. 

 Jovis, cujus Logarithmus = 1.42 5 3712, & tempus 

 Periodicum t = I44i928",5> c"jus Logarithmus = 



6.1589437» 



