Mr. Gilpin’s Observations on the Variation 
Table I. 
Observations on the Variation of the magnetic Needle. 
i 7 S 7 
7 A.M. 
8 A.M. 
10 A.M. 
12 M. 
1 P. M. 
2 P.M. 
4 P.M. 
6 P.M. 
8 P. M. 
10 P. M. 
ii P.M. 
O / 
0 / 
O ^ 
O / 
O / 
0 / 
O / 
0 / 
0 / 
0 / 
0 / 
Dec. i 
23 21 
23 21 
23 20 
23 29 
2 3 3 i 
23 3 ° 
23 28 
23 22 
2 3 2 3 
23 22 
23 22 
2 
20 
21 
21 
3 1 
3 i 
3 i 
27 
2 3 
22 
21 
22 
3 
21 
20 
21 
3 ° 
3 i 
29 
26 
22 
22 
2 3 
4 
21 
22 
22 
3 ° 
3 1 
3 1 
... 
... 
22 
2 1 
... 
5 
18 
20 
21 
28 
3 i 
26 
26 
22 
21 
23 
... 
6 
22 
22 
2 3 
29 
29 
3 ° 
28 
24 
2 3 
21 
... 
7 
21 
21 
22 
28 
3 ° 
29 
26 
2 3 
2 3 
22 
22 
8 
20 
21 
21 
26 
28 
z 9 
29 
26 
22 
22 
... 
9 
22 
20 
21 
26 
31 
3 ° 
26 
26 
21 
22 
... 
IO 
21 
21 
21 
2 9 
29 
29 
2 5 
2 3 
21 
22 
21 
I 1 
18 
21 
22 
28 
2 9 
3 i 
28 
21 
23 
21 
12 
20 
20 
21 
33 
33 
33 
3 i 
2 4 
24 
19 
13 
... 
21 
21 
28 
30 
3 ° 
27 
2 5 
... 
22 
H 
21 
2 1 
26 
30 
3 i 
33 
... 
... 
... 
22 
20 
22 
22 
3 ° 
3 i 
3 ° 
2 7 
21 
2 3 
20 
16 
... 
22 
29 
3 1 
28 
3 i 
... 
2 5 
22 
22 
17 
22 
2 3 
3 i 
33 
33 
... 
2 3 
22 
2 3 
21 
18 
21 
20 
28 
2 9 
29 
28 
2 3 
24 
22 
l 9 
... 
19 
22 
2 9 
28 
2 7 
2 5 
2 3 
22 
2 3 
20 
... 
21 
24 
28 
3 ° 
2 9 
26 
24 
24 
24 
21 
... 
2 3 
26 
2 9 
2 9 
29 
2 5 
22 
22 
22 
22 
... 
21 
21 
2 4 
26 
24 
22 
2 S 
20 
*9 
2 3 
... 
x 9 
21 
2 4 
2 4 
24 
... 
20 
20 
*9 
24 
... 
20 
20 
2 9 
30 
29 
2 4 
24 
22 
22 
2 5 
... 
22 
20 
28 
28 
28 
26 
22 
20 
21 
26 
... 
22 
22 
2 9 
33 
29 
26 
22 
2 3 
22 
2 7 
... 
21 
2 1 
24 
26 
26 
2 3 
2 1 
21 
21 
28 
... 
21 
21 
2 5 
2 5 
26 
2 4 
2 3 
20 
21 
2 9 
... 
20 
20 
23 
22 
2 5 
z 5 
20 
20 
21 
30 
... 
21 
21 
2 S 
3 ° 
29 
... 
... 
... 
31 
... 
21 
20 
29 
26 
28 
2 5 
22 
22 
• •• 
