208 
LIEUT.-COLONEL SABINE ON TERRESTRIAL MAGNETISM. 
Observations of the Intensity of the Magnetic Force made in Her Majesty’s Ship 
Erebus, from September 1840 to April 1841, with Needle R. F. 4. 
Observers Captain Ross and Lieutenant Smith, R.N. 
Correc- 
1840. 
Lat. 
Long. 
Method 
employed. 
Angle of 
deflection. 
CS 
S <j5 
P* 5- 
a s 
Ship’s head. 
p 
<v 
tion for 
ship’s 
attrac- 
Corrected 
Intensity. 
Remarks. 
H 
tion. 
Sept. 17- 
Magnetic Observa- 
O / 
o 
tory, Hobarton. 
Deflector S. 
50 00-8 
52 
— 42 52 
147 24 
wt. \ gr. 
2 41-4 
52 
Observed 
>• on shore*. 
18. 
wt. 1 gr. 
wt. 1| gr. 
5 22-7 
8 14-6 
52 
1-820 
1-820 
52 
[ 
wt. 2 grs. 
10 49-6 
52 
wt. 3 grs. 
16 15 
52 
Oct. 17- 
r- 
S. 
49 23 
54 
s.E. by S. 
1-869 
-•035 
1-834" 
. 
S. 
49 51 
54 
w. 
1-833 
-•003 
1-830 
o 
S. 
49 27-2 
54 
s. by e. 
1-864 
— •043 
1-821 
■4J 
q 
S. 
49 39 
54 
S.S.E. 
1-849 
-•039 
1-810 
21. 
S. 
49 50-9 
51 
W.N.W. 
1-833 
+ •008 
1-841 
S. 
49 48-8 
51 
S.E. 
1-835 
-•031 
1-804 
29. 
jn 
*~p , 
S. 
50 19-8 
48 
N. 
1-792 
+ •028 
1-820 
p 
S. 
50 23-7 
48 
N.N.E. 
1-787 
+ •024 
1-811 
CD 
S. 
50 21-8 
48 
N.E. 
1-789 
+ •020 
1-809 
5 
S. 
50 02-9 
48 
E.N.E. 
1-816 
+ ■008 
1-824 
«2 < 
S. 
S. 
49 53-5 
50 09-4 
48 
48 
E. 
N.N.W. 
1-828 
1-807 
-•003 
+ •024 
1-825 
1-831 
>1-823 
G 
O 
S. 
50 12-6 
48 
N.W. 
1-803 
+ •020 
1-823 
O 
S. 
49 40 
48 
W.S.W. 
1-848 
-•017 
1-831 
CD 
U 
S. 
49 52-2 
48 
w. 
1-831 
-•003 
1-828 
O 
s. 
49 56-2 
48 
W.N.W. 
1-826 
+ •008 
1-834 
s. 
49 28-8 
48 
s.vv. 
1-862 
— •031 
1-831 
”3 
s. 
49 28-2 
48 
S.8.W. 
1-863 
-•039 
1-824- 
rG 
o 
s. 
49 27-0 
48 
S. 
1-864 
-•046 
1-818 
o 
s. 
49 24*5 
48 
S.S.E. 
1-867 
-•039 
1-828 
H 
s. 
49 39-5 
48 
S.E. 
1-849 
— •031 
1-818 
s. 
49 52-7 
48 
E.S.E. 
1-830 
-•017 
1-81 3 J 
Nov. 13. 
-44 10 
149 29 
s. 
N. 
49 23-8 
47 05-9 
54 
54 
E.S.E. < 
1-868 
1-855 
— •017 
-•017 
1-851 ' 
1-838 j 
1-844 
14. 
-45 13 
151 57 
s. 
49 34-5 
45 
i 
' 
1-855 
-•031 
1-824 
1-833 
f Much motion. 
N 
46 50-5 
45 
S.E. ^ 
1-872 
-•031 
1-841 J 
< Observations by 
L no means good. 
15. 
-45 33 
152 45 
S. 
N. 
49 56-9 
46 53-5 
51 
51 
j 
E. j 
1-824 
1-869 
-•003 
-•003 
1-821 
1-866 
- 1-843 
1 Ship pitching 
] greatly. 
16. 
-46 18 
154 30 
S. 
N. 
49 50-7 
47 17 
57 
57 
E.S.E. 
' 
1-833 
1-841 
— •017 
-•017 
1-816] 
1-824 J 
■ 1-820 
17 
-47 46 
157 40 
S. 
N. 
49 52 
47 15 
51 
51 
1 
>S.E.by E. \ E.< 
r 
1-831 
1-843 
— •020 
-•020 
1-811 ] 
1-823 J 
- 1-817 
Much motion. 
18. 
-49 20 
160 13 
S. 
N. 
49 34 
46 47*2 
50 
50 
J 
L 
1-856 
1-876 
-•020 
-•020 
1-836] 
1-856 
> 1-846 
* The angles of deflection with 4, 5 and 6 grains, not having been observed at Hobarton, have been com- 
puted from the angles produced by the five weights which were employed at that station ; they are as follows : — 
4* 22 06 
5 28 03-5 
6 34 21. 
