04 
MR. AIRY ON THE OBSERVED DEVIATIONS OF THE COMPASS 
Table of Polar-Magnet-Deviations, 
Apparent Azimuth from Neutral 
Position 
in points and decimals. 
•5 
Modulus. 
0 
•51 
•53 
•53 
•54 
•55 
*56 
•57 
•58 
•59 
•60 
Corresponding 
Polar-Maguet-Deviation, in degrees and minutes. 
+ 
+ 
- 
- 
P 
P 
P 
P 
o 
/ 
O 
/ 
O 
/ 
O 
/ 
o 
/ 
o 
/ 
0 
/ 
o 
/ 
0 
/ 
0 
/ 
0 
0-0 
16-0 
16-0 
33-0 
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 
34 
0 
34 
0 
35 
0 
36 
0 
36 
0 
37 
0 
38 
0 
38 
0 
39 
0 
40 
0 
41 
0-3 
15-8 
16-3 
31-8 
1 
7 
1 
8 
1 
10 
1 
11 
1 
13 
1 
14 
1 
16 
1 
17 
1 
18 
1 
19 
1 
21 
0-3 
15-7 
l6-3 
31-7 
1 
41 
1 
43 
1 
45 
1 
47 
1 
49 
1 
52 
1 
54 
1 
56 
1 
58 
2 
0 
2 
2 
0-4 
15-6 
16-4 
31*6 
3 
15 
3 
17 
2 
30 
2 
33 
2 
25 
2 
28 
2 
31 
2 
33 
o 
36 
2 
39 
2 
42 
0-5 
15-5 
16-5 
31-5 
3 
49 
2 
53 
2 
55 
3 
58 
3 
2 
3 
5 
3 
9 
3 
12 
3 
16 
3 
19 
3 
23 
0-6 
15'4 
16-6 
31*4 
3 
33 
3 
36 
3 
30 
3 
34 
3 
38 
3 
42 
3 
47 
3 
51 
3 
55 
3 
59 
4 
3 
0-7 
15-3 
16-7 
31-3 
3 
56 
4 
0 
4 
5 
4 
9 
4 
14 
4 
19 
4 
24 
4 
28 
4 
33 
4 
38 
4 
43 
0-8 
15-3 
16-8 
31*3 
4 
39 
4 
34 
4 
40 
4 
45 
4 
51 
4 
56 
5 
2 
5 
7 
5 
12 
5 
17 
5 
23 
0-9 
15-1 
16-9 
3M 
5 
3 
5 
9 
5 
15 
5 
31 
5 
27 
5 
33 
5 
39 
5 
45 
5 
51 
5 
57 
6 
3 
1-0 
15-0 
17-0 
31-0 
5 
36 
5 
43 
5 
49 
5 
55 
6 
2 
6 
9 
6 
16 
6 
22 
6 
29 
6 
36 
6 
43 
1*1 
14-9 
17-1 
30-9 
6 
9 
6 
16 
6 
24 
6 
31 
6 
39 
6 
46 
6 
54 
7 
1 
7 
8 
7 
15 
7 23 
1-3 
14-8 
17-3 
30-8 
6 
43 
6 
50 
6 
58 
7 
6 
7 
14 
7 
22 
7 
31 
7 
39 
7 
47 
7 
55 
8 
3 
1-3 
14-7 
17-3 
30-7 
7 
15 
7 
33 
7 
33 
7 
41 
7 
50 
7 
59 
8 
8 
8 
16 
8 
25 
8 
34 
8 
43 
1-4 
14-6 
17'4 
30-6 
7 
48 
7 
57 
8 
7 
8 
16 
8 
26 
8 
35 
8 
45 
8 
54 
9 
3 
9 
12 
9 
22 
1-5 
14-0 
17-5 
30-5 
8 
31 
8 
31 
8 
41 
8 
51 
9 
1 
9 
11 
9 
22 
9 
32 
9 
42 
9 
52 
10 
2 
1-6 
14‘4 
17-6 
30-4 
8 
53 
9 
4 
9 
15 
9 
35 
9 
36 
9 
47 
9 
58 
10 
8 
10 
19 
10 
30 
10 
41 
1-7 
14-3 
17-7 
30-3 
9 
35 
9 
36 
9 
48 
9 
59 
10 
11 
10 
22 
10 
34 
10 
45 
10 
57 
11 
8 
11 
20 
1-8 
14-3 
17-8 
30-3 
9 
58 
10 
10 
10 
22 
10 
34 
10 
46 
10 
58 
11 
11 
11 
23 
11 
35 
11 
47 
11 
59 
1-9 
14-1 
17-9 
30-1 
10 
30 
10 
43 
10 
56 
11 
8 
11 
21 
11 
34 
11 
47 
11 
59 
12 
12 
12 
25 
12 
38 
3-0 
14-0 
18-0 
30-0 
11 
2 
11 
15 
11 
29 
11 
42 
11 
56 
12 
9 
12 
23 
12 
36 
12 
49 
13 
2 
13 
16 
3-1 
13-9 
18-1 
39-9 
11 
34 
11 
48 
13 
3 
13 
16 
12 
30 
12 
44 
12 
58 
13 
12 
13 
26 
13 
40 
13 
54 
3-3 
13-8 
18-3 
39-8 
13 
5 
13 
30 
13 
35 
13 
49 
13 
4 
13 
19 
13 
34 
13 
48 
14 
3 
14 
18 
14 
33 
3-3 
13-7 
18-3 
39-7 
13 
36 
13 
51 
13 
7 
13 
33 
13 
38 
13 
53 
14 
9 
14 
25 
14 
40 
14 
55 
15 
11 
3-4 
13-6 
18-4 
396 
13 
7 
13 
33 
13 
39 
13 
55 
14 
11 
14 
27 
14 
44 
15 
0 
15 
16 
15 
32 
15 
48 
3-5 
13-5 
18-5 
39-5 
13 
38 
13 
54 
14 
11 
14 
27 
14 
44 
15 
1 
15 
18 
15 
35 
15 
51 
16 
8 
16 
25 
3-6 
13-4 
18-6 
39-4 
14 
8 
14 
35 
14 
43 
15 
0 
15 
18 
15 
35 
15 
53 
16 
10 
16 
38 
16 
45 
17 
3 
3-7 
13*3 
18-7 
39*3 
14 
38 
14 
56 
15 
14 
15 
32 
15 
50 
16 
8 
16 
27 
16 
45 
17 
3 
17 
21 
17 
40 
3-8 
13-3 
18-8 
39-2 
15 
8 
15 
36 
15 
45 
16 
4 
16 
23 
16 
42 
17 
1 
17 
19 
17 
38 
17 
57 
18 
16 
3-9 
13-1 
18-9 
39-1 
15 
38 
15 
57 
16 
17 
16 
36 
16 
56 
17 
15 
17 
35 
17 
54 
18 
13 
18 
32 
18 
52 
3-0 
13-0 
19-0 
39-0 
16 
8 
16 
38 
16 
48 
17 
8 
17 
28 
17 
48 
18 
8 
18 
28 
18 
48 
19 
8 
19 
28 
3-1 
13-9 
19-1 
38-9 
16 
37 
16 
58 
17 
18 
17 
38 
17 
59 
18 
20 
18 
41 
19 
1 
19 
22 
19 
43 
20 
4 
3-3 
13-8 
19-3 
38-8 
17 
6 
17 
27 
17 
48 
18 
9 
18 
31 
18 
52 
19 
14 
19 
35 
19 
56 
20 
17 
20 
39 
3-3 
13-7 
19-3 
38-7 
17 
34 
17 
56 
18 
18 
18 
40 
19 
2 
19 
24 
19 
46 
20 
8 
20 
30 
20 
52 
21 
14 
3-4 
13-6 
19-4 
38-6 
18 
3 
18 
24 
18 
47 
19 
9 
19 
32 
19 
55 
30 
18 
20 
40 
21 
3 
21 
25 
21 
48 
3*5 
13-5 
19-0 
38-5 
18 
30 
18 
53 
19 
16 
19 
39 
20 
2 
20 
26 
20 
49 
21 
12 
21 
35 
21 
58 
22 
22 
3-6 
13-4 
19-6 
38-4 
18 
57 
19 
31 
19 
45 
30 
9 
20 
33 
20 
57 
21 
21 
21 
44 
22 
8 
22 
32 
22 
56 
3-7 
13-3 
19-7 
38-3 
19 
34 
19 
48 
30 
13 
30 
37 
31 
2 
31 
26 
21 
51 
22 
15 
23 
40 
23 
4 
23 
29 
3-8 
13-3 
19-8 
38-3 
19 
50 
30 
15 
30 
41 
31 
6 
21 
31 
21 
56 
22 
22 
22 
47 
23 
12 
23 
37 
24 
2 
3-9 
13'] 
19-9 
38-1 
30 
16 
30 
43 
31 
8 
31 
34 
21 
59 
32 
25 
22 
51 
23 
17 
33 
43 
24 
8 
24 
34 
4-0 
13-0 
30-0 
38-0 
1 30 
43 
31 
8 
31 
34 
33 
1 
22 
27 
22 
53 
23 
20 
23 
46 
34 
13 
24 
39 
25 
6 
+ 
+ 
