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Art. XXXIV.— Acowwif of the Large Comet qf\S\^. 
This large and interesting comet was seen at Edinburgh on 
the 1st of July, about 11 o’clock in the evening. It appeared 
in the northern part of the horizon, about 15° to the west of 
north, and with an altitude of little more than 8°. Notwith- 
standing its proximity to the sun, being only about 19° from 
that luminary, it exhibited a very large and brilliant nucleus. 
Its tail, which was so highly transparent, as to permit the 
smallest stars to be seen through it, was directed to the zenith, 
and did not extend more than 2° or 3° from its body. The 
direction of its motion was almost due north, and it was ob- 
vious, from the rapid diminution of its magnitude and lustre, 
that it was moving away from the Earth with a very consider- 
able velocity. 
Our celebrated Astronomer Royal, Mr Pond, observed the 
comet with his usual accuracy, and obtained the following results : 
1819. 
July 3. 
7. 
11 . 
Mean time at 
Greenwich. 
6' 55".S 
11 53 S.O 
12 6 7.4 
R. Ascens. of 
Comet. 
6h 51' 35" .6 
7 8 9.5 
7 22 20.2 
Declination 
North. 
43° 41' 13" 
48 17 41 
50 31 22 
From these data, Mr Charles Rumker, an excellent and zeal- 
ous astronomer, computed the elements of its orbit, which he 
had the kindness to transmit to us on the 16th July, and which, 
though only a first approximation, were wonderfully accurate, 
when compared with the results of more numerous observations. 
Mr Pond continued to observe the comet on the 18th, 22d, 
23d, 24th, 25th and 26th of July, and having communi- 
cated the results to Mr Rumker, that gentleman deduced from 
them the following elements : 
Passage of the perihelion, 1819, June 28. 485132. 
Longitude of the node. 
Longitude of the perihelion upon the orbit. 
Inclination of the orbit, - - 
Logarithm of the perihelion distance. 
Perihelion distance, - - 
Motion, 
9^ 3° 53' 40" 
9 20 47 59 
80 7 41 
9.5592732 
0.362476 
Direct. 
