406 Mr. Gilpin's Observations on the Variation , 
Table I. 
Observations on the Variation of the magnetic Needle. 
1787 
6 A.M. 
7 A.M. 
8 A.M. 
10 A.M. 
12 M. 
1 P.M. 
2 P.M. 
4P.M. 
6 P.M. 
8 P.M. 
10 P.M. 
11 P.M. 
0 / 
0 / 
O / 
O / 
O / 
O / 
O / 
O / 
O y 
O / 
O / 
0 t 
Apr. i 
23 ... 
23 12 
23 12 
23 16 
23 24 
23 26 
23 28 
23 26 
23 21 
23 19 
23 19 
10 
00 
2 
... 
7 
7 
20 
32 
35 
37 
36 
... 
... 
... 
3 
J S 
10 
18 
23 
24 
24 
22 
15 
17 
16 
• •• 
4 
... 
9 
10 
15 
24 
25 
25 
22 
16 
1 1 
16 
17 
5 
... 
10 
JO 
‘5 
25 
26 
26 
22 
*9 
• 18 
18 
18 
6 
. • . 
H 
14 
16 
2 3 
3 ° 
3 ° 
23 
18 
13 
*3 
7 
... 
9 
9 
12 
23 
28 
29 
24 
J 9 
13 
12 
J 3 
8 
... 
10 
10 
12 
23 
29 
3 ° 
24 
*9 
15 
9 
... 
8 
8 
*5 
26 
3 ° 
3 1 
29 
22 
18 
>7 
17 
10 
8 
7 
8 
J 4 
23 
27 
28 
26 
20 
.16 
16 
16 
1 1 
8 
7 
8 
12 
21 
28 
29 
24 
18 
*5 
16 
1 2 
... 
7 
7 
10 
17 
27 
28 
23 
16 
12 
11 
12 
13 
... 
1 1 
1 1 
*3 
*9 
26 
27 
23 
17 
16 
17 
16 
14 
... 
8 
8 
13 
21 
23 
28 
J 9 
15 
*4 
14 
H 
15 
9 
8 
8 
*3 
23 
3 ° 
29 
J 9 
16 
14 
13 
*3 
16 
18 
18 
18 
21 
29 
3 ° 
... 
... 
16 
1 6 
*7 
17 
... 
8 
8 
*3 
23 
26 
27 
21 
*5 
*S 
15 
... 
18 
7 
8 
12 
24 
26 
26 
z 3 
20 
»S 
*5 
19 
9 
8 
TO 
13 
23 
26 
25 
J 9 
20 
... 
... 
... 
20 
6 
10 
6 
1 1 
22 
28 
29 
21 
18 
J 7 
»7 
17 
21 
12 
1 1 
1 1 
*3 
23 
26 
27 
26 
25 
J 9 
18 
18 
22 
• • • 
*5 
15 
55 
20 
21 
24 
24 
17 
17 
J 7 
17 
2 3 
7 
8 
6 
13 
23 
24 
24 
20 
»5 
16 
17 
16 
24 
1 1 
13 
1 1 
»5 
25 
28 
26 
25 
17 
17 
16 
16 
2 5 
... 
9 
9 
10 
27 
26 
26 
17 
*7 
18 
>7 
18 
26 
8 
9 
1 1 
24 
27 
26 
21 
20 
... 
... 
... 
27 
1 1 
10 
19 
3 ° 
32 
32 
17 
18 
18 
17 
«i • 
28 
9 
10 
12 
12 
23 
23 
23 
J 7 
*5 
15 
13 
>4 
29 
7 
6 
9 
21 
25 
25 
21 
17 
>5 
... 
... 
30 
1 - - - 
• to 
1 3 
*3 
J 5 
2 S 
28 
27 
20 
J 5 
H 
15 
14 
