199 
during the Expedition under Captain Parry. 
Captain Parry justly conjectures, that the dip would have been 
greater here than they had observed it, but there was not time 
to measure it. 
From the experiments made at Winter Harbour to determine 
the variation in the magnetic force, it appears that the time of 
vibration of Mr Brown’s dipping-needle decreased between Lon- 
don and Winter Harbour in the ratio of 481 to 446 ; and con- 
sequently, the force in the direction of the dipping-needle ap- 
peared to have increased in the ratio of 1.168 to 1. 
From the increase in the times of vibration of three horizon- 
tal needles between Sheerness and Winter Harbour, the force 
acting upon them appeared to have diminished in the ratio of 
12.98 to 1 ; 18.28 to 1 ; and 18.88 to 1 ; the mean of which is 
18.88 to 1. 
2. Meteorological Observations . 
While the magnetical observations of Captain Parry may be 
expected to fix, beyond dispute, the position of the western 
magnetic pole, the meteorological results which he obtained have 
also settled many contested points respecting the distribution of 
heat, and have confirmed, in a very remarkable manner, the 
doctrine of two poles of maximum cold, which Dr Brewster had 
maintained to exist at a distance from the pole of the globe. 
The following Table contains an abridged view of the ther- 
mometrical results for a whole year, from September 1. 1819 to 
September 1. 1820, during which period the Hecla was within 
Lancaster Sound*. From September 1. 1819 to August 27. 
1820, within three days of a whole year , the expedition was on 
the south coast of Melville Island , so that the register may be 
considered as actually kept for the whole year at Winter Har- 
bour, and as giving, with great accuracy, the mean temperature 
of that latitude. 
* It deserves to he remarked, that the mean temperature of the month of July 
1819 in Baffin’s Bay, was much colder than the same month in 1820 at Winter 
Harbour ; being 33°«51 in the former case, and 4-2°.tl in the latter. 
