OBSERVATIONS ON THE MAGNETIC FORCE 
CXXXV 
1819, June 26th. On Ice in Davis’ Strait, Lat. 64° 00' N., Long. 61° 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 
o 
M 
s 
o 
M 
s 
o 
M S 
60 
60 
60 
10 
2 
40 
2 
32 
2 33 
52 
42 
45 
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 
1819, 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 
o 
M S 
0 
M S 
0 
M S 
60 
60 
60 
10 
43 
2 54 
31 
2 40 
38 
2 40 
10 
38 
2 48 
25 
2 34.5 
27 
2 34 
10 
25 
2 47.5 
16 
2 32 
16 
2 32.5 
10 
22 
2 45.5 
12 
2 32 
8 
2 31.5 
10 
20 
2 44 
6 
2 33 
7 
2 31.5 
10 
18 
2 43.5 
4 
2 33 
6 
2 32 
10 
16 
2 43.5 
10 
10 
2 43.5 
10 
9 
2 43 
10 
8 
2 43 
