364 ACCOUNT or the arctic regions. 



(the anomaly thereby occasioned in the mean tem- 

 perature,) so is 242 the whole number of clays in 

 consideration, to 21°, the probable anomaly which 

 might be expected,' were the temperature always in- 

 fluenced by the ice, or the anomaly which may be 

 supposed to occur at the Pole. Therefore, if from 

 31°, the calculated temperature of the Pole, we de- 

 duct 21®, we have 10° for the corrected mean tem- 

 perature thereof. 



This result will be farther corroborated, if we ap- 

 ply the same mode of investigation to another series 

 of observations. In the former, the observations 

 made in the Greenland Sea, in part of the months 

 of April and May, or in the mean temperature 

 month, have been the data for determinino- the 

 frigorific effect of the ice on the temperature of the 

 Pole ; we shall now make use of the observations 

 made in the month oi May, during a series of twelve 

 years, for the same purpose. 



The amount of frigid winds, including the pro- 

 portion of variable winds and calms, that occurred 

 in the 78th parallel of latitude in the month of May, 

 during a period of twelve years, comprising 372 

 days, was 257.2 days ; and the mild winds which 

 prevailed during the same period, amounted to 

 114.8 days. The mean temperature of May, lati- 

 tude 78°, appears by observation to be 22°.5, but by 

 calculations made by Kirwan, founded on Mayer's 

 formula, it comes out 37° ; so that the frigorific ef- 



