196 
LIEUT.-COLONEL SABINE ON TERRESTRIAL MAGNETISM. 
Observations of the Intensity of the Magnetic Force made in Her Majesty’s Ship 
Erebus, with Needle R. F. 5 , between April 17, 1841 , and August 23 , 1842 . 
Observers Captain Sir James Clark Ross and Lieutenant Alexander Smith, R.N. 
1841. 
Lat. 
Long. 
Method 
employed. 
Angle of 
deflection. 
Face east. 
j Tempera- 8 
j lure. § 
Ship’s head. 
Intensity. 1 
Apr. 19- 
O / 
Magnet 
o / 
c Obser- 
Def. S. 
56 
28-6 
O 
64 
-| 
vatory, Hobarton. 
Def. N. 
53 
02-6 
63 
-42 52 
147 24 
wt. 6 grs. 
42 
55-7 
61 
Observed 
wt. 5 grs. 
wt. 4 grs. 
34 
26 
23-5 
47-7 
60 
60 
on shore. 
1-820 
wt. 3 grs. 
19 
37-2 
60 
20. 
wt. 2 grs. 
13 
02-8* 
60 
J 
June 29- 
At anchor in the 
Def. S. 
56 
40-5 
44 
N. 
1-809 
river Derwent. 
Def. S. 
56 
44-8 
44 
N.N.E. 
1-806 
Def. S. 
56 
34-3 
45 
N.E. 
1-815 
Def. S. 
56 
26-1 
45 
E.N.E. 
1-820 
c n 
Def. S. 
56 
24-4 
47 
E. 
1-821 
o> 
Def. S. 
56 
17-8 
47 
E.S.E. 
1-825 
u 
Def. S. 
55 
52-9 
48 
S.E. 
1-846 
e2 . 
Def. S. 
55 
46-5 
50 
S.S.E. 
1-851 
e 3 
Def. S. 
55 
42-7 
48 
s 
1-854 
O *+3 
Def. S. 
55 
48-7 
48 
s.s.w. 
1-849 
o g 
Def. S. 
55 
51-0 
48 
s.w. 
1-847 
§ * 
Def. S. 
56 
10-3 
48 
w.s.w. 
1-832 
o 
Def. S. 
56 
17-8 
48 
w. 
1-825 
.5 
Def. S. 
56 
15-3 
48 
W.N.W. 
1-830 
Def. S. 
56 
30-5 
49 
N.W. 
1-817 
o 
Def. S. 
56 
29-0 
48 
N.N.W. 
1-818 
H 
Def. S. 
56 
32-8 
48 
N. 
1-815 
July 7- 
Running out of 
Def. S. 
55 
37-6 
49 
S.E. \ E. 
1-858 
Storm Bay. 
Def. N. 
52 
16-3 
47 
S.E. A E. 
1-854 
8. 
-43 00 
148 28 
Def. S. 
56 
20-7 
52 
N.N.E. 
1-823 
Def. N. 
53 
12-2 
52 
N.N.E. 
1-807 
9- 
-42 13 
149 25 
Def. S. 
57 
03-3 
56 
N.N.W. 
1-790 
Def. N. 
53 
37-1 
56 
N.N.W. 
1-785 
10. 
-40 54 
149 13 
Def. S. 
57 
07-3 
54 
N. by w. 
1-786 
Def. N. 
53 
51-6 
60 
N. by w. 
1-773 
11. 
— 37 50 
150 22 
Def. N. 
54 
45-9 
56 
n. by w. 
1-732 
12. 
-37 21 
151 33 
Def. S. 
58 
08-0 
61 
N.E. 
1-742 
Def. N. 
54 
59-1 
61 
N.E. 
1-722 
13. 
-36 01 
151 48 
Def. N. 
55 
08-5 
58 
n.w. by n. 
1-715 
14. 
-33 52 
151 21 
Def. S. 
59 
41-8 
60 
N. 
1-676 
Def. N. 
55 
55-6 
60 
N. 
1-679 
15. 
Garden Island, 
Def. S. 
59 
09-0 
53 
1-698 
Sydney. 
Def. N. 
55 
35-9 
52 
1-694 
— 33 51 
151 17 
wt. 6 grs. 
46 
51-7 
55 
1-698 
wt. 5 grs. 
37 
43-3 
55 
Observed 
1-680 
wt. 4 grs. 
wt. 3 grs. 
29 
21 
09-2 
13-7 
55 
55 
on shore. 
1-683 
1-687 
wt. 2 grs. 
13 
57-4 
56 
1-703 
Def. S. 
59 
ll-4f 
52 
1-696 
Def. N. 
55 
38-1 
52 
1-692 
Correction 
for ship’s 
attraction. 
Corrected 
Intensity. 
Remarks. 
Deflector employed 
R. F. 4. 
1-820 
+ •024 
.... 1-832 
+ •022 
1-828 
+ •018 
.... 1-833 
+ •013 
1-833 
+ •004 
.... 1-825 
— •006 
1819 
—•016 
1-830 
— •023 
1-828 
—•026 
1-822 
V 
—•023 
1-826 
-•016 
1-831 
-•006 
1-826 
+ •004 
.... 1-829 
+ •013 
1-843 
+ •018 
1-835 
+ •022 
1-840 
+ •024 
.... 1-839 
— •014 
+ •022 
+ •022 
+ •024 
+ •024 
+ •022 
+ •027 
+ •031 
1-842 1-842 
1-837 1-837 
1-809 1-809 
1-804 1-804 
1-756 1 
l 1-755 
1-754 J 
l-742i 
1 1-720 
1-708 J 
1-685 1-685 
7+830 
A heavy head swell. 
A head swell. 
Much motion. 
Running along the 
land. 
The results with the 
face west are in. 
eluded in the 
mean. 
* Observed on 
shore ; face 
west. 
'wt. 6 grs. . . 43 07*5 Ther. 58 
wt. 5 grs. . . 34 51-5 Ther. 58 
wt. 4 grs. . . 27 02-7 Ther. 58 
wt. 3 grs. . . 19 55-5 Ther. 60 
_wt. 2 grs. . . 13 1 4-5 Ther. 60 
f Observed on 
shore ; face< 
west. 
0 , 0 Intensity. 
"wt. 6 grs. . . 47 32-4 Ther. 63 1-688 
wt. 5 grs. . . 37 38-9 Ther. 63 1-704 
wt. 4 grs. . . 2 9 32-1 Ther. 64 1-680 
wt. 3 grs. . . 21 51-4 Ther. 63 1-667 
.wt. 2 grs. . . 14 32-6 Ther. 64 1-662 
