186 
LIEUT.-COLONEL SABINE ON TERRESTRIAL MAGNETISM 
Observations of Declination. (Continued.) 
Position. 
Declination 
Direction of 
Correction 1 
Corrected 
Mean 
1841. 
r c3 
for ship’s 
attraction. 
Declina- 
5 
Lat. 
Long. 
*3 
observed. 
ship’s head. 
Declination. 
tion. 
a 
0 
K . 
Feb. 9 p-m. 
O 
-77 
57 
188 
30 
R. 
— 102 30 
s.s.w. 
O 
' 
O 
+ 8 
52 
— 93° 38'-) 
O 
/ 
-77 
56 
188 
40 
R. 
—110 29 
s.w. \ s. 
+ 14 
32 
- 95 57 
-77 
56 
188 
40 
R. 
— 106 13 
s.s.w. | w. 
+ 11 
50 
— 94 23 
-77 
-77 
54 
54 
188 
188 
36 
36 
R. 
s. 
— 105 51 
— 103 13 
s.w. by s. 1 
s.s.w. \ w. | 
-86 
00 
< 
+ 12 
+ 10 
49 
50 
- 93 02 1 
- 92 23 r 
- 93 
41 
-77 
51 
188 
24 
R. 
— 103 18 
s.s.w. w. 
+ 10 
50 
— 92 28 
-77 
50 
188 
06 
R. 
— 94 04 
s. \ w. 
+ 1 
04 
- 93 00 
-77 
50 
188 
06 
S. 
- 94 38 
s. 
0 
0 
- 94 38j 
10 A.M. 
-77 
35 
187 
59 
S. 
- 94 12 
s. 
0 
0 
- 94 121 
-77 
57 
187 
38 
T. 
-110 56 
s.w. \ w. 
+ 17 
38 
- 93 18 
-77 
38 
188 
07 
Y. 
- 97 53 
s. by w. 
+ 4 
28 
— 93 25 
-77 
-77 
38 
40 
188 
188 
07 
00 
T. 
Sm. 
-101 54 
-108 00 
s.s.w. 1 
s.w. by s. ( 
-86 
00 
< 
+ 8 
+ 12 
52 
49 
- 93 02 1 
- 95 11 r 
- 93 
41 
-77 
48 
188 
00 
s. 
-108 49 
s.w. by s. 
+ 12 
49 
- 96 00 j 
-77 
48 
188 
00 
0 . 
— 105 38 
s.w. \ s. 
+ 14 
32 
- 91 06 j 
-77 
48 
188 
04 
T. 
-106 04 
s.w. by s. 
+ 12 
49 
- 93 15J 
11 A.M. 
-76 
45 
189 
06 
O. 
- 74 47 
s. i E. i 
/• 
' — 1 
06 
- 75 531 
-76 
46 
188 
40 
S 
— 86 56 
s. by w. \ w. 
+ 6 
40 
- 80 16 
-76 
46 
188 
40 
s. 
- 80 11 
s. > 
— 86 
00 
< 
0 
00 
— 80 11 K 
- 77 
53 
-76 
46 
188 
40 
s. 
- 95 11 
s.w. \ s. 
+ 14 
32 
- 80 39 
11 P.M. 
-76 
14 
187 
11 
s. 
— 86 06 
N.W. - 5 - N. 
+ 13 
39 
- 72 27 
14 A.M. 
-76 
-76 
23 
24 
178 
176 
25 
26 
s. 
R. 
- 98 02 
- 91 24 
s. by w. \ w. 
s. bv w. j w. 
-87 00 
< 
+ 8 
+ 10 
50 
17 
— 89 12 
- 81 07 ’ 
— 85 
10 
15 P.M. 
-76 
03 
1 68 
56 
R. 
— 85 31 
s. by e. J- e.' 
■ -10 
13 
- 95 441 
-76 
05 
168 
56 
s. 
- 88 32 
s. by e. i e. ( 
-87 50 
-12 
13 
-100 45 l 
•- 98 
45 
-76 
05 
168 
56 
0 . 
- 86 55 
s. by E.j-E.f 
-12 
13 
- 99 08 f 
-76 
16 
168 
11 
R. 
- 85 10 
s. by e. | e.J 
i 
-14 
13 
- 99 23 J 
16 A.M. 
-76 
20 
165 
33 
s. 
- 60 54 
I “N 
E. f N. 
" —45 
47 
— 106 411 
-76 
20 
165 
33 
T. 
- 69 12 
s.e. by e. 
-37 
32 
-106 44 1 
-76 
-76 
20 
20 
165 
165 
33 
33 
O. 
Y. 
- 67 08 
— 65 20 
s.e. by e. ( 
E.S.E. f 
-87 
53 
< 
-37 
-42 
32 
18 
-104 40 ( 
— 107 38 ( 
— 106 
13 
-76 
20 
l65 
33 
T. 
- 64 59 
E.S.E. 
-42 
18 
-107 17 
-76 
30 
166 
39 
R. 
- 58 06 
E. 
-46 
13 
-104 19 
16 P.M. 
-76 
35 
166 
17 
R. 
- 64 23 
e. by s.|s.' 
' -44 
03 
— 108 261 
-76 
36 
l66 
17 
R. 
-136 19 
N.N.W. \ W. 
+ 19 
46 
— 116 33 
-76 
36 
166 
17 
Y. 
-150 04 
W.N.W. 
+ 41 
38 
-108 26 
-76 
36 
166 
16 
T. 
-138 24 
N.W. bv N. 
+ 23 
31 
-114 53 
-76 
36 
166 
16 
Y. 
— 158 51 
w. 
+ 46 
13 
— 112 38 
-76 
36 
166 
16 
Y. 
-156 58 
w. bv s. \ s. 
+ 44 
03 
-112 55 
-76 
-76 
36 
36 
166 
166 
16 
17 
T. 
R. 
-156 05 
-154 06 
S.W. i w. ( 
s.w. by w. 
> -87 
53 
*1 
+ 33 
+ 37 
04 
32 
-123 01 
— 116 34 
> —113 
23 
-76 
36 
166 
17 
R. 
— 142 54 
S.w. ^ s. 
+ 29 
45 
-113 09 
-76 
37 
166 
16 
It. 
- 67 01 
E.N.E. 
— 41 
38 
-108 39 
-76 
37 
166 
16 
It. 
- 67 53 
e. by s. 
— 45 
19 
-111 51 
-76 
37 
166 
16 
S. 
- 66 32 
e. by s. 
-45 
19 
-113 12 
-76 
37 
166 
16 
T. 
— 73 45 E.S.E. 
— 42 
18 
-116 03 
-76 
37 
166 
35 
It. 
— 73 40 S.E. by e. 
-37 
32 
— 111 12J 
* The inclination on the 16th of February is computed from the observed declinations with the head 
West — 158° 51', and E. by S. — 67° 12'. From these we have the approximate inclination 6 = — 87° 52'„ 
With this value of 0, rp' = — 66° 27' at East. Whence rj/ = 
158° 51' + 66° 27' 
= - 112° 89'; $ at East 
or West = 46° 12' ; and tan 0 = 
sin 46° 12' 
•7218 
•0267 
= - 87° 53' 
