MAGNETIC SURVEY OF A PART OF THE SOUTHERN HEMISPHERE 
427 
Observations of the Magnetic Force between Van Diemen Island and the Cape 
of Good Hope, by Lieut. Joseph Dayman, R.N. 
Date. 
Lat. 
Long. 
Weights. 
Angle of 
deflection. 
Thermo- 
meter. 
Ship’s head. 
Intensity. 
Correction 
for ship’s 
attraction. 
Corrected 
Intensity. 
Hobarton 
= 1-800. 
Remarks. 
1844. 
o 
/ 
grs. 
O 
/ 
O 
Dec 
6. 
— 42 
— 42 
52 
52 
147 
147 
24 
24 
2 
3 
10 
16 
43 
11 
71 
71 
j- On shore. 
1*800 
1-800 
I 
1-800 
Magnetic Observa- 
tory, Hobarton. 
16. 
— 44 
— 44 
48 
48 
144 
144 
51 
51 
2 
3 
10 
15 
21 
32 
55 
55 
w. by s. 
w. by s. 
1-863 
1-873 
| —041 
1-827 
17. 
— 44 
— 44 
30 
30 
143 
143 
56 
56 
2 
3 
10 
15 
31 
29 
67 
67 
w. by s. 
w. by s. 
1-834 
1-879 
j — -041 
1-815 
18. 
— 44 
-44 
34 
34 
142 
142 
51 
51 
2 
3 
10 
15 
20 
44 
69 
70 
\v. by s. 
w. by s. 
1-866 
1-851 
j — -041 
1-818 
19. 
-44 
34 
139 
37 
3 
15 
18 
63 
s.w. by s. 
1-901 
-•053 
1-848 
21. 
— 42 
— 42 
24 
24 
137 
137 
18 
18 
2 
3 
10 
15 
29 
24 
69 
70 
w. 
w. 
1-840 
1-889 
j --037 
1-828 
23. 
— 41 
-41 
46 
46 
133 
133 
26 
26 
2 
3 
10 
15 
32 
18 
58 
57 
N. 
N. 
1-831 
1-901 
| —020 
1-846 
28. 
-40 
-40 
05 
05 
128 
128 
23 
23 
0 
3 
10 
15 
05 
49 
63 
63 
n.w. by n. 
n.w. by n. 
1-912 
1-840 
o 
a* 
0 
1 
1-856 
A long heavy “swell. 
30. 
-39 
-39 
25 
25 
124 
124 
04 
04 
2* 
3 
10 
16 
38 
04 
65 
65 
N. by w. 
n. by w. 
1-814 
1-813 
j —020 
1-793 
A long heavy swell. 
31. 
-38 
-38 
00 
00 
123 
123 
38 
38 
2 
3 
10 
16 
25 
19 
62 
62 
N.N.W. 
N.N.W. 
1-852 
1-786 
j — -020 
1-799 
A long heavy swell. 
1845. 
Jan. 
1. 
-38 
-38 
21 
21 
122 
122 
46 
46 
2 
3 
10 
15 
49 
59 
71 
72 
n.w. by w. 
n.w. by w. 
1-783 
1-822 
j — -025 
1-777 
3. 
-37 
14 
124 
58 
2 
10 
55 
69 
N.W. 
1-767 
1 *771 
-37 
14 
124 
58 
3 
16 
03 
69 
N.W. 
1-815 
6. 
-36 
-36 
28 
28 
118 
118 
57 
57 
2 
3 
11 
16 
11 
41 
67 
67 
N.N.W. 
N.N.W. 
1-725 
1-747 
| — -020 
1-716 
7. 
-35 
—35 
22 
22 
117 
117 
46 
46 
2 
3 
11 
16 
04 
44 
65 
64 
N.N.W. W. 
N.N.W. ^ W. 
1-743 
1-742 
| — -020 
1-722 
li. 
—36 
06 
116 
42 
2 
10 
55 
68 
S.S.W. 
1-767 
i.7i c; 
-36 
06 
116 
42 
3 
16 
26 
68 
S.S.W. 
1-773 
> — *UOD 
16. 
-34 
58 
112 
59 
2 
11 
24 
66 
N.W. 
1-693 
I .mo 
1 .£«£ 
-34 
58 
112 
59 
3 
17 
07 
66 
N.W. 
1-704 
17. 
-33 
-33 
47 
47 
111 
111 
04 
04 
2 
3 
11 
17 
54 
53 
67 
67 
N.w. by w. 
n.w. by w. 
1-623 
1-629 
} — *017 
1-609 
18. 
—33 
37 
108 
24 
2 
11 
57 
69 
n.w. by w. 
1-616 
1 «m 7 
1-603 
-33 
37 
108 
24 
3 
17 
59 
69 
n.w. by w. 
1-624 
20. 
-29 
-29 
40 
40 
105 
105 
28 
28 
2 
3 
12 
18 
30 
58 
72 
72 
N.W. £ N. 
N.W. N. 
1-546 
1-543 
j — -007 
1-537 
21. 
-28 
04 
105 
06 
2 
13 
02 
73 
N. 
1-484 
1 .IQ*? 
—28 
04 
105 
06 
3 
19 
24 
73 
N. 
1-510 
22. 
-26 
44 
104 
26 
2 
13 
03 
76 
N.W. 
1-483 
-26 
44 
104 
26 
3 
20 
05 
76 
N.W. 
1-462 
> — -noy 
1 ^DO 
23. 
-25 
-25 
52 
52 
102 
102 
58 
58 
2 
3 
13 
20 
39 
24 
75 
75 
N.W. 
N.W. 
1-418 
1-439 
o 
o 
1 
1-421 
24. 
— 24 
50 
101 
31 
2 
13 
31 
76 
N.W. 
1-432 
—24 
50 
101 
31 
3 
20 
51 
76 
N.W. 
1-410 
V — UUO 
25. 
— 24 
— 24 
00 
00 
99 
99 
33 
33 
2 
3 
13 
21 
30 
02 
75 
75 
W.N.W. 
W.N.W. 
1-435 
1-400 
| —010 
1-407 
27. 
—23 
— 23 
11 
11 
95 
95 
40 
40 
2 
3 
14 
21 
22 
58 
78 
78 
w. by N. ^ n. 
w. by n. % n. 
1-350 
1*342 
j — -012 
1-334 
28. 
— 22 
-22 
54 
54 
93 
93 
48 
48 
2 
3 
H 
22 
16 
03 
78 
79 
w. by n. n. 
w. by n. n. 
1*360 
1-338 
| — *012 
1-337 
29. 
— 22 
19 
91 
16 
2 
15 
02 
77 
W. £ N. 
1-291 
1 .m 
1 *077 
—22 
19 
91 
16 
3 
22 
46 
77 
W. ^ N. 
1-297 
> ui/ 
A / 
30. 
-22 
— 22 
17 
17 
89 
89 
57 
57 
2 
3 
14 
22 
58 
28 
80 
81 
W. i N. 
W. £ N. 
1-296 
1-314 
j —017 
1-288 
31. 
— 22 
—22 
11 
11 
86 
86 
30 
30 
2 
3 
15 
22 
11 
38 
80 
80 
W. N. 
W. i N. 
1-278 
1-304 
j —oi7 
1-274 
