1 98 Account of the Scientific Observations made 
Observations on the Dip of the Needle. 
North 
Latitude. 
West 
Longitude. 
Dip. 
1819, 
0 / // 
O « 
O / // 
March 
51 31 
0 8 
70 33 27 
Regent’s Park, London. 
June 26. 
64. 0 
61 50 
83 4 41 
Ice, Davis’ Strait. 
July 17. 
72 0 
60 0 
84 14 9 
Ice, Baffin’s Bay. 
31. 
73 31 
77 22 
86 3 7 
Possession Bay. 
Aug, 7. 
72 45 15 
89 41 
88 26 71 
E. coast of Regent’s Inlet. 
11. 
72 57 
89 30 
88 25 17 
On iee. 
15. 
73 33 
88 18 
87 35 95 
N. Side of Barrow’s Strait. 
28. 
75 10 
103 44 
88 25 58 
B. Martin’s Island. 
30. 
74 55 
104 12 
88 29 12 
Ice, 400 yds. dist. from ship. 
Sept. 6. 
74 47 
110 34 
88 29 91 
Beach, Melville Island. 
11. 
74 27 
111 42 
88 36 95 
Melville Island. 
1820, 
(July 18. 
74 47 
110 48 
88 43 5 
Observatory, Winter Harbour. 
Ice, Davis’ Strait, 
I Sept. 17. 
68 30 
64 21 
84 21 42 
j- 28. 
51 43 
0 14 
70 33 5 
Near London. 
The change in the direction of the variation from Westerly tq 
Easterly ^ must have taken place about the 102d degree of west 
longitude, and shews that the expedition must at that point, which 
they passed on the 27th of August, have been a few degrees to 
the north of the Great Magnetic Pole. This conclusion agrees 
very wonderfully with the position of this pole, as assigned by 
M. Hansteen, who places it in 1819 in 69° 40' of North Lat., 
(5° 23' to the south of the ships on the 27th August), and in 
90° of West Longitude. 
After entering Lancaster’s Sound, the deviation produced 
by the ship’s action increased uniformly and rapidly as the 
expedition proceeded Westward. It increased, also, as they 
advanced southward into Prince Regent's Inlet , and the usual 
observations for determining the variation on board ship were 
necessarily abandoned. On the 7th August, in Lat. 73°, they 
witnessed, for the first time, the curious phenomenon of the di- 
rective power of the needle becoming so weak as to be complete- 
ly overcome by the action of the ship, so that the needle actual- 
ly pointed to the north pole of the ship. This, however, was 
observed only with the light and nicely suspended needles ; for 
iiPthe heavier cards, the friction could not be overcome by the 
ship's action, and they accordingly remained indifferently in any 
position. On the 8th August, when nearly in Lat. 72°, the di- 
rective power of the magnet seemed to be weaker here than ever. 
