430 
Scientijic Intelligence. 
the end of 18S1 or the beginning of In considering the 
action of the planets upon the comet from 1786 to 1819, M. 
Encke has found, that Jupiter alone will have any material ef- 
fect upon the time of the next perihelion in 182S, retarding it 
more than 9 days, the least distance of the comet from J upiter 
being 1,136. The following are the elements upon two hypo- 
theses assumed by M. Encke, the one assigning a period longer 
by a day than the other : 
Passage of the perihelion, mean time at 
Seeberg, - , _ 
Long. Mean Distance, 
Long, of the Perihelion from the Mean 
Equinox, 2ith May 1822, 
Longitude of the Ascending Node, 
Inclination of the Orbit, 
Angle of Excentricity, 
Daily Motion, 
1822, May 24. 1822, May 25. 
.3472191 .3474612 
157° 12* 
334 23 40 
13 20 36 
57 38 30 
1069'^49307 1068 '59904 
From the ephemeris calculated with these elements, it appears 
that the comet will not be easily seen in Europe till the spring 
of 1822 ; but it may possibly he seen in December 1821 or Ja- 
nuary 1822 by very powerful telescopes. In southern latitudes 
it will be readily seen on the 9th or 10th June 1822, when it 
will be like a star of the fifth magnitude. On the 1st July it 
will be brighter than a star of the fourth magnitude. The fol- 
lowing are its places in 1 822, the mean being taken of the two 
hypotheses : 
Mean Noon 
at Seeber 
g. 11. Asc 
Decl. Comp, brightness. 
Feb. 25. 
0° 42' 
- 7'’17' N. 
0.011 
Mar. 5. 
4 14 
8 49 N. 
0.013 
April 6. 
- 22 31 
16 13 N. 
0.037 
May 8. 
- 54 47 
24 18 N. 
0.293 
June 1. 
- 91 48 
18 40 N. 
1.737 
17. 
107 58 
2 15 N. 
2.066 
25. 
119 53 
12 42 S. 
2.583 
July 3. 
141 40 
33 57 S. 
2.723 
27. 
233 26 
47 15 S. 
0.385 
See the 
(Quarterly Journal of Science^ 
vol. X. p. 413. 
4. New Comet of 1821. — M. Pons, astronomer royal in the 
observatory of Marlia, near Lucca, discovered a comet in the 
constellation Pegasus, on the 21st January, between six and se- 
ven o’clock in the evening. This comet seemed to him of a very 
