14 
LIEUT.-COLONEL SABINE ON TERRESTRIAL MAGNETISM. 
Table I. 
Observations of the Magnetic Intensity on Shore, and on Board Her Majesty’s Ship 
Erebus, with Needle F, by Captain James Clark Ross. 
London to the Cape of Good Hope. 
1839. 
Position. 
Time of day. 
Lat. 
Long. E. 
h 
m 
Aug. 28. 
Westbourn 
5 
P.M. 
Green near 
London. 
O / 
O 
/ 
Oct. 1 . 
50 42 
0 
35 
1 
P.M. 
11 
A.M. 
Noon. 
3. 
50 17 
357 
26 
10 
30 A.M. 
8. 
47 47 
350 
42 
10 
A.M. 
13. 
41 6 
348 
10 
9 
A.M. 
14. 
39 30 
347 
51 
9 
30 A.M. 
10 
15 A.M. 
11 
0 A.M. 
21. 
Funchal Roads. 
10 
0 A.M. 
11 
0 A.M. 
23. 
Consul’s House, 
7 
A.M. 
Funchal. 
10 
A.M. 
Noon. 
32 381343 
04 
0 
30 p.m. 
24.? 
10 
30 A.M. 
26. 
Funchal Roads. 
2 
0 P.M. 
3 
10 P.M. 
3 
50 p.m. 
4 
30 p.m. 
Nov. 1. 
30 471343 
10 
10 
A.M. 
to 
Noon. 
4. 
Off Santa Cruz, 
10 
A.M. 
Teneriffe. 
to 
Noon. 
6. 
26 1 
342 
25 
10 
A.M. 
10 
20 A.M. 
11 
1 5 A.M. 
11 
50 A.M. 
1 
30 P.M. 
2 
0 P.M. 
7. 
24 51 
341 
18 
10 
30 A.M. 
8. 
23 40 
340 
45 
0 
30 P.M. 
4 
0 P.M. 
1 
30 p.m. 
2 
15 P.M. 
3 
0 P.M. 
3 
30 p.m. 
4 
0 P.M. 
Method employed. 
Deflection 
observed. 
Thermo- 
meter. 
Deflector S. 
O 
30 
19 
O 
70 
Deflector N. 
22 
57 
Deflectors S. & N. 
44 
6 
weight 1 grain. 
10 
34 
weight 2 grains. 
21 
47 
weight 3 grains. 
33 
24 
weight 4 grains. 
47 
52 
60 
S. 
30 
38 
weight 2 grains. 
21 
54 
weight 4 grains. 
48 
17 
weight 2 grains. 
21 
41 
60 
weight 4 grains. 
47 
45 
56 
S. 
30 
43 
weight 2 grains. 
21 
1 
S. 
30 
43 
61 
S. and N. 
45 
1 
weight 2 grains. 
22 
43 
S. 
30 
22 
65 
S. and N. 
44 
35 
weight 2 grains. 
22 
45 
S. 
31 
14 
73 
S. and N. 
45 
17 
weight 2 grains. 
23 
7 
73 
weight 4 grains. 
51 
45 
S. 
31 
18 
70 
S. and N. 
45 
17 
71 
weight 2 grains. 
23 
12 
70 
weight 3 grains. 
35 
45 
weight 4 grains. 
51 
55 
S. 
31 
10 
70 
weight 1 grain. 
11 
23 
74 
weight 2 grains. 
23 
20 
weight 3 grains. 
36 
5 
S. 
31 
26 
70 
weight 1 grain. 
11 
29 
weight 2 grains. 
23 
39 
S. 
31 
53 
76 
weight 1 grain. 
11 
40 
weight 2 grains. 
24 
5 
S. 
32 
34 
74 
S. and N. 
46 
42 
weight 2 grains. 
24 
37 
weight 3 grains. 
38 
48 
S. 
31 
34 
74 
S. and N. 
45 
58 
S. 
32 
58 
77 
S. and N. 
46 
52 
S. 
33 
3 
76 
s. 
33 
8 
74 
s. 
32 
45 
72 
s. 
32 
51 
73 
s. 
33 
4 
73 
weight 1 grain. 
11 
54 
weight 2 grains. 
25 
12 
Ship’s head. 
Intensity. 
London = 1-000 = 1-372 
Observed 
on shore. 
w. by n. 
w. by n. 
s.w. by w. 
s.w. by w. 
s.w. by w. 
w. by s. 
^Observed , 
on shore. * 
w. by s. 
s.s.w. 
s.s.w. 
1-000 
•9851 
•993 y -990 
•992 J 
1-003 1 J.0Q1 
1-000 / 
9 81 1 1-007 
1-033 / ' 
•9821 
•959 > -966 
•959j 
•993d 
•978 y -977 
•959 J 
9581 
S.W. £ w, 
N.W. 1 N. 
S.W. £ W. 
S.W. W. 
S.W. ■§ W. 
E. 
W. 
S. 
S.W. § W. 
S.W. •§ W. 
•948 1 
•946 > 
•949 
> -946 
•941 
•945 
*955~ 
-948 
•942 
•942 
•943 
•96l = 
•930 
•937 f 
•935 J 
•9481 
•921 y -931 
•925 J 
•9291 
•908 y -916 
•910 J 
•900' 
•894 
•892 
•879 
•943 
•920 
•884" 
•889/ 
•880 
•877 
‘892 
•888 
•879 
•890 
•872 
> -905 
•886 
> -883 
1-372 
1-358 
1-373 
1-382 
1-326 
1-346 
1-302 
1-297 
1-291 
1-277 
1-256 
1-241 
1-216 
1-212 
