M. Mitchell— Observations on Jupiter and its Satellites. 39 
1874, May 7.—The ingress of the Ist satellite of Jupiter was 
observed. The satellite was in external contact at 105 50" 39s. 
The internal contact was at 105 55™ 7s, 
1874, May 14.—Observations on Jupiter began at 8 P. M. 
The broad equatorial belt was rosy and was seen fully out to 
the following limb. The shadow of the 3d satellite was upon 
the disc. The shadow was dark but not black. I could not~ 
call it circular; the longer diameter was nearly parallel with ~ 
the equatorial belt. It left the planet’s disc at 10 1™ 118-1. 
1874, May 19.—The noticeable peculiarity of the planet's 
disc is that of a large white spot on the broad belt near the 
center at 8410™ p.m. At 95 45™ no trace of this spot could 
be found, although the equatorial belt was seen out to the 
preceding limb. 
1874, May 22.—There was a very decided change in the 
spots from dark to light between 95 6™ Pp. M. and 95 35™ P, M. 
1874, May 28.—The planet was unusually striped. The broad 
belt was much spotted and its upper part heavily shaded. 
There was a rosy tinge over the whole belt. The 3d satellite 
touched the limb of Jupiter, at ingress, at 9" 56" 44s p.m. Its 
internal contact was at 10° 6™ 15° p. M. Although it entered 
on a part of the planet which was not bright, it could be fol- 
lowed only ten minutes. 
1874, June 2—There were peculiar white markings on the 
lower part of the equatorial belt of Jupiter; these were beyond 
the center-at 8" 25™. The 2d satellite touched the limb in 
The internal contact with limb was at 0° 46" 16%. The satel- 
lite was last seen 1" 2™ 51°, although it was upon the dark belt. 
The shadow was followed for some six minutes longer. 
1875, April 23.—The 8d satellite of Jupiter was wholly off 
from the dise of the planet at 7°15" 2° p.m. The shadow of 
the 3d satellite touched the limb, at egress, at 7° 43™ 7° P. M. 
The shadow was wholly off at 8° 1™ 51° p. M. Measurements 
were made of both satellite and shadow. The diameter of the 
satellite measured 2’"17, of the shadow 17°95. : 
1875, April 30.—The 3d satellite touched the following 
limb of Jupiter at 8° 21™ 19°-3. The internal contact was at 
8" 40™ 24*-3. The shadow of the satellite was fully upon the 
disc at 9" 48" 9*-3. The equatorial belt was slightly ruddy, 
and dark and white spots could be seen upon it. The Ist and 
4th satellites were so nearly of the same size that I could dis- 
tinguish them only by position. : 
1875, May 10, 8 to 9.30 P. Mi—A white loop extended diag- 
onally over more than half the equatorial belt of Jupiter. 
