Radices or Epochs of their Motions. 
The firft Satellite was obferved 45 degrees diftant from its 
Perigee, moving towards the Wejfy March luh 16S6 CxN. 
^t ioh. 40 min. at night , and returned to the fame po- 
fition on the i^h. of at the fame Ai?;^r. 
The fecond was 36 degrees diftant from the Perig^ to the 
Wefi^ the loth of March 1686 ft. N.atS of the clock in the 
evening. 
A Comparifon of the Re'z/olntions of Ssiturns Satellites 
with Jupiters. 
It were too much at this tlijie, togive all we have obfer- 
ved of the other SatelUtes.bvit we cannot mifs comparing the 
Periods of the Sate/lites of S^^^m with thofe of Jupiter ^ after 
the following manner, by which it appears that the Satell- 
ites of Saturn in the fame order, performe their Revolutions 
in lefi time, than thofe of J^j?/>^r, that anfwer to them; 
except the firft, . as may be feen in this Table. 
day hour min. 
The frft Satellite of Jupiter revolves in — 1 — 18—29 
The firfl Satellite (?/ Saturn ~ — -— i — 21 — 19 
The fecond ofSzinm in — — 2^—17 — 43 
The fecond of Jupiter in- -—• - — J ~ ^3 — 19 
The third of Saturn z;^ — 4 — 12 — 27 
The third ^Jupiter — — — 7—4—0 
The fomh ^?/ Saturn in — 15 — 23 — 15 
The fourth c?/ Jupiter in 16—18 — 5 
The fft of Saturn in rrrrr~".T:r'r:r" 79 — 21 — o 
