454 M. Mitchell—Observations on Jupiter and rts Satellites. 
Art. XLIX.—WNotes of Observations on Jupiter and its Satellites ; 
by Prof. M. Mrrcweutu, of Vassar College. No. 2. 
difference of brilliancy of color between it and the planet. 
1872, Jan. 17. 8415™ to 9h 12m, A circular white spot was 
seen on the lower part of the broad belt of Jupiter, sufficiently 
defined to be measure 
On the 25th, at 8 Pp. M., a spot, apparently exactly like that 
seen on the 17th, was observed in the upper part of the broad 
belt, measuring nearly the same in diameter. 
1872, Jan. 30. The Ist satellite which was known to be 
upon the planet could not be seen until it touched the limit at 
its egress, although its path must have lain wholly within the 
dark belt. It was by measurement smaller in diameter than 
its shadow. 
1872, Feb. 2. The 2d satellite was seen as an irregular 
white spot when a little past the center of the disc. The 
shadow appeared to be larger than the satellite, but, on measur- 
ing, was found to be smaller. 
1872, Feb. 7. The 8d satellite showed a very well defined 
dise with no spot. Its diameter was 2”-09. 
1872, Feb. 26. The 4th satellite was occulted. It became 
very indistinct as it approached Jupiter. Its light was whiter 
that of the whitest portion of the planet. It became mm 
visible at 94 48m 42s-64, 
1872, Feb. 28. The night was remarkably good. | 
‘ge white spots were seen on the equatorial belt at 7 P. M 
They were well defined and were measured. They were ¥IS 
ible for a short time only, and could not be seen to follow with 
the planet as it turned. Dark spots seemed to succeed them 
in the same position on the disc. | 
_ The 8d satellite was first seen to emerge from shadow at 
7h 5m 43°4. Tt was fully out at 7 11™ 4*4, The occultation 
“the Ist satellite occurred at 9° 6™ 39%4. 
