394 M. Mitchell on Jupiter and its Satellites. 



Nov. 1, 1870. — Two shadows and one satellite were seen at 

 once on Jupiter's disc. The satellite, which was the first, was 

 faint, brown, and ill defined, when first seen ; near the center 

 of the planet, its shape was oval. A large spot could he seen 

 on the fourth satellite. 



Nov. 10, 1870.— The narrow southern dark belt has a violet 

 tinge. 



Nov. 16, 1870. — A short and broad violet marking was seen 

 near the northern border. 



Nov. 28, 1870.— The broad equatorial belt could be seen out 

 to the following edge. There were three large white spots upon 

 it. The third satellite was warmer in tint than the other three. 



Dec. 3.— The broad belt was seen again, quite out to the fol- 

 lowing limb. The first satellite was seen on the planet near 

 the preceding limb, of dazzling whiteness, resembling the polar 

 regions of Mars. White spots were noticed on the broad belt 

 The fourth satellite seemed to have a halo around it. 



Dec. 10, 1870.— I began early to watch for the entrance of 

 the first satellite and its shadow. The planet was low and 

 the air full of tremor. I lost the satellite at once, when it en- 

 tered upon the planet, and did not see it until 8 p. M., when I 

 found it near the center of the disc. It seemed to be round and 

 was dusky in color. Only twelve minutes later, this round 

 figure had enlarged and become an irregular oval figure, stretch- 

 ing into the broad equatorial belt ; it was then very distinct. 

 As the shadow and satellite were thrown upon the planet 

 nearly at the same time, it is probable that they were seen to 

 gether, but there was no distinction of color. It seemed as 

 large as the third satellite plus about its third. The whole 

 shrunk suddenly, and then disappeared a few minutes after ^ 

 P. M., and at 9^ 32'" P. M. the satellite reappeared, still on the 

 planet, round and very white. At 10^ 5™ the broad dark equa- 

 torial belt was seen out to the following edge. I have given 

 the changes of the first satellite in figs. 3 and 4. No inequality 

 of brightness could be detected in the bright belt along whicU 

 the course of the satellite lav. 



Dec. 16, 1870.— The noticeable peculiarities are, the contm- 

 uance of the dark equatorial belt quite out to the limb ot tne 

 planet, both preceding and following, but more strongly jn tne 

 latter case, and the unequal brightness of the southern bngni 

 belt, presenting in a coarse way something of the appearance 

 of the sun's disc. The third satellite was brighter at the cente 

 than at the edges. -, ■ 



Jan. 7, 1871.— A very marked phenomenon is fepresen+'^'i iii 

 figs. 5 and 6. A white oval spot was seen 

 ish spots at 6*' 57™. It was afterwards 



preceded by two bro^ 

 seen only by gimp 



