ASTRONOMY. 185 



The Table of their inclinations will be afterwards 

 given. 



187. The first satellite has been found, from 

 observation, to have an inequality, which, mea- 

 sured by time, is 3 m 30 sec , varying as the sine of 

 the satellite's distance from a certain point in 

 its orbit. 



WARGENTIN found out this inequality from obser- 

 vation. VINCE, Astron. vol. I. 421. 



188. The second satellite is subject to an in- 

 equality of l6 m 30 sec in time, having its changes 

 included in a period of 437 days. 



a. The period of 4-37 days, is also that in which th& 

 first three satellites return to the same situation in 

 respect of Jupiter. 



The third satellite is subject to an inequality nearly 

 of the same amount, and circumscribed by the same 

 period. This is also from the observations of WAR- 

 GENTIN. 



189. The orbit of the fourth satellite is sensi- 

 bly elliptical ; the equation of the centre is 50" 

 20" nearly, and the place of the higher apsis in 

 1700 was 10 29 22" ; the longitude of the sa- 

 tellite being 7 s 17 18' 2". 



a. From 



