106 
LIEUT.-COLONEL SABINE ON TERRESTRIAL MAGNETISM. 
Observations of the Inclination with Needles whose poles were reversed, made at the 
Magnetic Observatory at Auckland Island. 
Date. 
Hour. 
Needle. 
Poles. 
a direct. 
0 reversed. 
1840. 
November 23. 
h m 
10 20 A.M. 
R 4 
a — 73 17*9 
23. 
1 00 P.M. 
R 10 
0—73 08-2 
a -73 14-4 
23. 
2 40 p.m. 
R 6 
0 -73 12-4 
a -73 15-7 
23. 
3 30 p.m. 
R 7 
13 —73 12-9 
a -73 14-7 
25. 
11 00 A.M. 
R G 1 
(3 —73 11-6 
a — 73 06‘6 
25. 
1 00 P.M. 
R G 2 
(3-73 17-0 
a -73 04-0 
27. 
3 00 p.m. 
C 1 
0—73 11-6 
a -73 08-7 
27. 
4 00 p.m. 
C 2 
(3 - 73 02-9 
a -73 08-2 
December 4. 
1 40 p.m. 
R G 1 
(3 -72 55-5 
Mean. 
j -73 
j -73 
j -73 
j -73 
I -73 
j -73 
j -73 
| -73 
j -73 
13-1 
13- 4 
14- 3 
13-2 
11-8 
07-8 
05-8 
01-8 
12-2 
-73 10-4 
Remarks. 
> Needles belonging to H.M.S. Erebus. 
H. M. S. Terror. 
H. M. S. Erebus. 
General Mean. 
Observations of the Inclination with Needles whose poles were reversed, at Campbell 
Island. 
Date. 
Hour. 
Needle. 
Poles. 
a direct. 
fi reversed. 
1840. 
h m 
December 1 5. 
9 30 a.m. 
C 1 
a —73 55-7 
(3 -73 48-4 
15. 
10 30 A.M. 
C 2 
a —73 51-2 
/ 3 —73 43-4 
15. 
10 30 A.M. 
R 4 
a -73 56-5 
(3 - 73 50*7 
15. 
15. 
11 00 A.M. 
Noon. 
R 10 
R 6 
a -74 01-5 
/ 3 -73 57*2 
a —73 45-8 
(3 -73 49-5 
15. 
1 00 P.M. 
R 7 
a -73 49-5 
0-73 53-3 
Mean. 
Remarks. 
J -73 52-1 
| -73 47-3 
| -73 50-6 
j -73 59-4 
j _73 47-7 
| -73 51-4 
— 73 51-4 
Needles belonging to H.M.S. Terror. 
VNeedles belonging to H.M.S. Erebus. 
General Mean. 
Inclination observed on Ice, in latitude — 68° 28', longitude 176° 32', with a Needle 
the poles of which were reversed. 
Date. 
Hour. 
Needle. 
Poles. 
a direct. 
/3 reversed. 
Mean. 
Remarks. 
1841. 
January 8. 
h m 
3 20 p.m. 
R 4 
a —83 35-3 
(3 -83 35-8 
o / 
j —83 35-6 
• 
H. M. S. Erebus. 
