B6B 
Scientific Intelligence, 
The following are the elements given by M. Nicolai r 
Passage of Perihelion, - Dec. 9^.4380 Manheim. 
Long, of Perihelion, - - 274° 18' 32'^ 
Long, of Node, - = 303 1 18 
S. dbservations of the Eclipses o/* Jupiter's Satellites ^ made 
at the Royal Observatory, Greenwich. — The following observa- 
tions were made by Mr Pond at the Koyal Observatory at 
Greenwich, in the years 1820, 1821, and 1822. 'J'hey are pe- 
culiarly valuable, for determining the longitudes of places where 
corresponding observations have been made : 
Year and 
Day. 
What 
Satel- 
lite. 
Immer- 
sion or 
Emersion. 
Mean 
Time. 
Year and 
Day. 
What 
Satel- 
lite, 
Immer- 
sion or 
Emersion. 
Mean 
Time, 
1820, 
H 
1822, 
H 
/ 
// 
July 16, 
2 
Im. 
14 
7 
54,7 
Jan. 14, 
1 
Em. 
6 
23 
49,7 
Aug. 10, 
2 
Im. 
11 
15 
40,0 
Feb. 6, 
1 
Em. 
6 
41 
6,9 
13, 
1 
Im. 
13 
53 
42,4 
Mar. 1, 
1 
Im. 
6 
58 
1,6 
22, 
1 
Im. 
10 
16 
17,5 
Aug. 28, 
3 
Ira. 
13 
29 
36,5 
Sept. 3, 
3 
Im. 
14 
34 
57,4 
30, 
1 
Em, 
11 
59 
32,3 
4, 
2 
Im. 
8 
20 
55,5 
30, 
2 
Im. 
13 
5 
37,3 
5, 
1 
Im. 
14 
4 
49,4 
Sept. 6, 
2 
Im. 
13 
9 
5,6 
29, 
2 
Em. 
8 
11 
50,6 
6, 
1 
Im. 
13 
53 
1,5 
30, 
1 
Em. 
11 
1 
46,0 
13, 
2 
Im. 
15 
46 
4,8 
Nov. 1, 
1 
Em. 
7 
42 
11,3 
13, 
1 
Im. 
15 
46 
32,8 
15, 
1 
Em, 
11 
34 
16,4 
29, 
1 
Im. 
14 
2 
20,7 
Oct. 3, 
3 
Em. 
11 
36 
10,0 
8, 
1 
Im. ' 
10 
24 
14,2 
8, 
2 
Im. 
12 
57 
6,0 
1821, 
10, 
3 
Im, 
13 
29 
5,8 
July 26, 
1 
Im. 
11 
50 
32,7 
10, 
3 
Em, 
15 
34 
56,0 
Aug. 4, 
2 
Im. 
11 
6 
6,6 
22, 
1 
Im, 
14 
11 
33,9 
11, 
2 
Im. 
13 
42 
58,9 
22, 
2 
Im. 
18 
11 
6,5 
Sept. 3, 
1 
Im. 
10 
17 
25,0 
26, 
2 
Im. 
7 
28 
0,7 
5, 
2 
Im. 
10 
53 
19,4 
29, 
1 
Ira. 
16 
5 
39,6 
11, 
3 
Em, 
10 
34 
4,2 
Nov. 2, 
2 
Im. 
10 
6 
49,5 
12, 
2 
Im. 
13 
31 
9,9 
5, 
1 
Im. 
17 
59 
23,3 
24, 
1 
Im. 
15 
58 
31,9 
7, 
1 
Im. 
12 
28 
18,0 
Oct. 7, 
2 
Im. 
10 
40 
24,9 
16, 
1 
Im. 
8 
51 
59,5 
28, 
1 
Em. 
9 
11 
19,5 
16, 
2 
Im. 
15 
21 
17,4 
Nov.' 4, 
1 
Em, 
11 
6 
18,8 
21, 
1 
Im. 
16 
15 
9 9 
27, 
1 
Em. 
11 
21 
31,8 
Dec. 11, 
2 
Em, 
15 
5 
37,6 
29, 
3 
Em. 
6 
43 
13,4 
21, 
3 
Im. 
5 
30 
17,8 
Dec. 6, 
1 
Em. 
7 
46 
25,5 
21, 
3 
Em. 
7 
45 
3,6 
6, 
3 
Im. 
8 
36 
10,3 
25, 
1 
Em. 
9 
29 
46,2 
22, 
1 
Em. 
6 
6 
43.7 
28, 
3 
Im. 
9 
31 
15,1 
29, 
2 
Em, 
9 
37 
57,0 
4. New Tide Gauge, — This proposed gauge consists of a pipe 
with an open mouth, and a triangular orifice at its side, in con- 
tact with any convenient part of a bridge or pier, that is situated 
