THE SATELLITES OF JUPITER.

Name.	Mean Distance from Centre of Jupiter.	Periodic Time.
		Days	Hrs.	Mins.	Secs.
I	262,000 miles.	1	18	27	34
II	417,000 ”	3	13	13	42
III	664,000 ”	7	3	42	33
IV	1,170,000 ”	16	16	32	11
V	112,400 ”	—	11	57	(?)