ON THE BLUE MOUNTAINS. ‘ 123 
Herschel’s double 5326 cannot be found; there is no such double 
in the place he assigns, and there must be either a mistake in his 
catalogue, which is s probable, or a disappearance of one of the stars, 
5326 in Herschel’s catalogue was examined, the stars are fully a 
magnitude less than he estimated them, and are now 10 magnitude. 
H. 5321 seems to be an error in Herschel’s list—angle is 
given 124°, it is now only 19° 18’; distance, 10° 29’ s 
5132 H.’s rot a this star is 180°, in error ; = should be 312° 
tirwmnined H. 3 He says nothing about colour in either 
discovered a very pretty double star, RA. 18h. 21m., dec. 
8 secs., and angle 2: 
star, both components gers ‘and of 7th magnitude ; distance is 
6° 2 oO 
a A gahont 
and 
double stars, ‘which there was not time to answer at Woodfor 
me time was given to Saturn, and clear views obtained, but 
the eibiaed is not in a good position for observation just now, for 
it is very difficult to tell whether a dark line which appears across 
his body is wholly the shadow of the ring, or made up of that 
and the dark line. which I found four years since, and which, it 
cmall, and the definition was toe id. As i Jupiter's 
limb, the blackness seemed to get hazy, as if it were seen through 
a mist, and at 7h. 27 -m. I lost sight of it; four minutes la 
m. 
it was detected as a small bright bulge on the limb of Jupiter, 
and its white edge against the black sky background looked whiter 
than the edge of Jupiter. At 7h. 36m. 40s. egress was com- 
plete, and there was nothing about its bright appearance then 
that would have — rise to the suspicion that it was black a 
fas minutes befor 
uring the daylight hours, when I was at work with the 
troseope, Mr. Hirst employed some of his time in looking up 
0 
known double stars; and of these some splendid views were 
obtained, but he found nothing about which 1 wish now to detain 
you, until the morning of the. 21st, at 9h. 5m., when, on ee 
at the moon, he found that a large part of it was cover 
- dark shade, quite as dark as the shadow of the earth during i 
eclipse of the-moon. Its outline .was generally circular, and it 
seemed to be fainter near its eh 28 Conspicuous bright spots on 
