OBSERVATIONS ON THE MAGNETIC FORCE 
CXXXV 
18 19, June 26th. On Ice in Davis’ Strait, Lat. 64° 00' N., Long. 6l° 50' W. distant 
222 Yards from the Ships ; Dip, 83° 04' N., by an indifferent Observation. 
No. of 
Needle 2 
Needle 3 
Vibrations 
Arcs 
Interval 
Arcs 
Interval 
Arcs 
Interval 
0 
M S 
0 
M S 
0 
M S 
60 
60 
60 
10 
52 
2 40 
42 
2 32 
45 
2 33 
10 
44 
2 36 
34 
2 27 
37.5 
2 29 
10 
36 
2 35 
26 
2 27 
32 
2 26 
10 
32 
2 33 
24 
2 24 
23 
2 24 
10 
28 
2 32 
19 
2 24 
20 
2 24 
10 
25 
2 32 
14.5 
2 24 
16 
2 24 
10 
23 
2 32 
10.5 
2 24 
14 
2 24 
10 
21 
2 31.5 
9 
2 24 
10.5 
2 23.5 
I8I9, July 23d and 24th. On Ice in Baffin’s Bay, Lat. 73° N., Long. 6l° 30' N., at a 
considerable distance from the Ships ; the Dip was not observed on the spot, but from 
other Observations, it must have been about 84° 30'. 
No. of 
Vibrations 
Needle 
2 
Needle 3 
Arcs 
Interval 
Arcs 
Interval 
Arcs 
Interval 
0 
M 
S 
0 
M 
s 
0 
s 
60 
60 
60 
10 
2 
54 
2 
40 
.2 
40 
43 
31 
38 
10 
2 
48 
2 
34.5 
2 
34 
38 
25 
27 
10 
2 
47.5 
2 
32 
2 
32.5 
25 
16 
16 
10 
2 
45.5 
2 
32 
2 
31.5 
22 
12 
8 
10 
2 
44 
2 
33 
2 
31.5 
20 
6 
7 
10 
2 
43.5 
2 
33 
2 
32 
IS 
4 
6 
10 
2 
43.5 
16 
10 
2 
43.5 
10 
10 
2 
43 
9 
10 
2 
43 
8 
