92 
MR. AIRY ON THE OHSERVED DEVIATIONS OF THE COxMPASS 
Table of Polar-Magnet-Deviations, 
Apparent Azimutli from Neutral 
Position 
in points and decimals. 
Modulus. 
•40 
•41 j 
•43 
•43 
•44 
•45 1 
•46 
•47 
00 
•49 
Corresponding Polar-Magnet-Deviation, in degrees and minutes. 
•50 
+ 
+ 
- 
- 
P 
P 
P 
P 
o 
/ 
o 
/ 
o 
/ 
o 
/ 
O 
/ 
o 
O 
/ 
o 
/ 
O 
o 
o 
0-0 
16-0 
l 6-0 
32*0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0 
0-1 
15-9 
16-1 
31-9 
0 
27 
0 
27 
0 
28 
0 
29 
0 
30 
0 
31 
0 
31 
0 
31 
0 
32 
0 
33 
0 
34 
0-2 
15-8 
l 6-2 
31-8 
0 
54 
0 
55 
0 
57 
0 
58 
1 
0 
1 
1 
1 
2 
1 
3 
1 
4 
1 
5 
1 
7 
0-3 
15-7 
16-3 
31-7 
1 
21 
1 
23 
1 
25 
1 
27 
1 
29 
1 
31 
1 
33 
1 
35 
1 
37 
1 
39 
1 
41 
0-4 
15^6 
16-4 
31-6 
1 
48 
1 
50 
1 
53 
1 
56 
1 
59 
2 
1 
2 
4 
2 
6 
2 
9 
2 
12 
2 
15 
0^5 
15-5 
16-5 
31-5 
O 
15 
2 
18 
2 
21 
2 
24 
2 
28 
2 
31 
2 
35 
2 
38 
2 
42 
2 
45 
2 
49 
0-6 
15-4 
16-6 
31-4 
2 
42 
2 
46 
2 
50 
2 
54 
2 
58 
3 
2 
3 
6 
3 
10 
3 
14 
3 
18 
3 
22 
1 0-7 
15-3 
16-7 
31-3 
3 
9 
3 
14 
3 
19 
3 
24 
3 
29 
3 
33 
3 
38 
3 
42 
3 
47 
3 
51 
3 
56 
0-8 
15-2 
16-8 
31-2 
3 
36 
3 
41 
3 
47 
3 
52 
3 
58 
4 
3 
4 
8 
4 
13 
4 
18 
4 
23 
4 
29 
' 0-9 
15-1 
16-9 
31-1 
4 
3 
4 
9 
4 
15 
4 
21 
4 27 
4 
33 
4 
39 
4 
45 
4 
51 
4 
57 
5 
3 
1-0 
15-0 
17*0 
31-0 
4 
29 
4 
35 
4 
42 
4 
49 
4 
56 
5 
2 
5 
9 
5 
15 
5 
22 
5 
29 
5 
36 
M 
14-9 
17*1 
30-9 
4 
56 
5 
3 
5 
10 
5 
17 
5 
25 
5 
32 
5 
40 
5 
47 
5 
54 
6 
1 
6 
9 
1-2 
14-8 
17*2 
30-8 
5 
oo 
5 
30 
5 
38 
5 
46 
5 
54 
6 
2 
6 
10 
6 
18 
6 
26 
6 
34 
6 
42 
1-3 
14-7 
17*3 
30-7 
5 
•48 
5 
57 
6 
6 
6 
15 
6 
24 
6 
32 
6 
41 
6 
49 
6 
58 
7 
6 
7 
15 
1-4 
14-6 
17*4 
30-6 
6 
14 
6 
23 
6 
33 
6 
42 
6 
52 
7 
1 
7 
11 
7 
20 
7 
29 
7 
38 
7 
48 
' 1-5 
14-5 
17*5 
30-5 
6 
40 
6 
50 
7 
0 
7 
10 
7 21 
7 
31 
7 
41 
7 
51 
8 
1 
8 
11 
8 
21 
‘ 1-6 
14-4 
17*6 
30-4 
7 
6 
7 
16 
7 
27 
7 
37 
7 48 
7 
59 
8 
10 
8 
20 
8 
31 
8 
42 
8 
53 
i 
1*7 
14-3 
17*7 
30-3 
7 
32 
7 
43 
7 
54 
8 
5 
8 
17 
8 
28 
8 
40 
8 
51 
9 
2 
9 
13 
9 
25 
' 1-8 
14-2 
17*8 
30-2 
7 
57 
8 
9 
8 
21 
8 
33 
8 
45 
8 
57 
9 
10 
9 
22 
9 
34 
9 
46 
9 
58 
1-9 
14-1 
17*9 
30-1 
8 
23 
8 
35 
8 
48 
9 
0 
9 
13 
9 
26 
9 
39 
9 
51 
10 
4 
10 
17 
10 
30 
2-0 
14-0 
18-0 
30-0 
8 
48 
9 
1 
9 
15 
9 
28 
9 
42 
9 
55 
10 
9 
10 
22 
10 
35 
10 
48 
11 
2 
: 2-1 
13-9 
18-1 
29*9 
9 
13 
9 
27 
9 
41 
9 
55 
10 
9 
10 
23 
10 
38 
10 
52 
11 
6 
11 
20 
11 
34 
2-2 
13-8 
18-2 
29*8 
9 
38 
9 
52 
10 
7 
10 
21 
10 
36 
10 
51 
11 
6 
11 
20 
11 
35 
11 
50 
12 
5 
' 2-3 
13-7 
18-3 
29*7 
10 
2 
10 
17 
10 
33 
10 
48 
11 
4 
11 
19 
11 
35 
11 
50 
12 
5 
12 
21 
12 
36 
2*4 
13-6 
18-4 
29*6 
10 27 
10 
43 
10 
59 
11 
15 
11 
31 
11 
47 
12 
3 
12 
19 
12 
35 
12 
51 
13 
7 
2-5 
13-5 
18*5 
29*5 
10 
52 
n 
8 
11 
25 
11 
41 
11 
58 
12 
15 
12 
32 
12 
48 
13 
5 
13 
21 
13 
38 
' 2-6 
13-4 
18-6 
29*4 
11 
16 
11 
33 
11 
50 
12 
7 
12 
24 
12 
41 
12 
59 
13 
16 
13 
33 
13 
50 
14 
8 
1 2-7 
13-3 
18-7 
29-3 
11 
40 
11 
57 
12 
15 
12 
33 
12 
51 
13 
9 
13 
27 
13 
44 
14 
2 
14 
20 
14 
38 
2-8 
13-2 
18-8 
29*2 
12 
3 
12 
21 
12 
40 
12 
58 
13 
17 
13 
35 
13 
54 
14 
12 
14 
31 
14 
49 
15 
8 
2-9 
13-1 
18-9 
29*1 
12 27 
12 
46 
13 
5 
13 
24 
13 
43 
14 
2 
14 
22 
14 
41 
15 
0 
15 
19 
15 
38 
3-0 
13-0 
19*0 
29*0 
12 
50 
13 
10 
13 
30 
13 
49 
14 
9 
14 
29 
14 
49 
15 
8 
15 
28 
15 
48 
16 
8 
31 
12-9 
19*1 
28-9 
13 
13 
13 
33 
13 
54 
14 
14 
14 
35 
14 
55 
15 
16 
15 
36 
15 
56 
16 
16 
16 
37 
3-2 
12-8 
19*2 
28-8 
13 
36 
13 
57 
14 
18 
14 
39 
15 
0 
15 
21 
15 
42 
16 
3 
16 
24 
16 
45 
17 
6 
3-3 
12-7 
19*3 
28-7 
13 
58 
14 
19 
14 
41 
15 
2 
15 
24 
15 
46 
16 
8 
16 
29 
16 
51 
17 
12 
17 34 
. 3-4 
12-6 
19*4 
28-6 
14 
20 
14 
42 
15 
4 
15 
26 
15 
48 
16 
10 
16 
33 
16 
55 
17 
17 
17 
39 
18 
2 
3-5 
12-5 
19*5 
28-5 
14 
42 
15 
4 
15 
27 
15 
50 
16 
13 
16 
36 
16 
59 
17 
21 
17 
44 
18 
7 
18 
30 
3-6 
12-4 
19-6 
28-4 
15 
3 
15 
26 
15 
50 
16 
13 
16 
37 
17 
0 
17 
24 
17 
47 
18 
10 
18 
33 
18 
57 
3-7 
12-3 
19*7 
28-3 
15 
24 
15 
48 
16 
12 
16 
36 
17 
0 
17 
24 
17 
48 
18 
12 
18 
36 
19 
0 
19 
24 
3-8 
12-2 
19*8 
28-2 
15 
45 
16 
9 
16 
34 
16 
58 
17 23 
17 
47 
18 
12 
18 
36 
19 
1 
19 
25 
19 
50 
3-9 
12-1 
19*9 
28-1 
16 
6 
16 
31 
16 
56 
17 
21 
17 
46 
18 
11 
18 
36 
19 
1 
19 
26 
19 
51 
20 
16 
4-0 
12-0 
20-0 
28-0 
16 
26 
16 
51 
17 
17 
17 
42 
18 
8 
18 
33 
18 
59 
19 
25 
19 
50 
20 
16 
20 
42 
+ 
