ATMOSPHEIIOLOGY.T— TEMPERATURE. 357 



the correction here would only have been about 0°.8 ; 

 but as a great decrease of temperature takes place 

 on removing from the coast to the interior of a 

 country, much more so must be the case in passing 

 deeper into the body of the polar ice, the frigorific 

 effect of which on the general temperature is so 

 striking. Now, the observations of May, June and 

 July, were generally made in or very near the body 

 of ice, and mostly in similar situations ; but many of 

 the observations of April were made at a consider- 

 able distance from the ice, and consequently much 

 less under its influence. I conceive, therefore, that 

 3° of temperature for these 2° of' latitude, as a cor- 

 rection, is not too considerable ; and that this cor- 

 rection is probably very nearly what it ought to be, 

 will more fully appear, when we observe the striking 

 conformity between this, together with all the other 

 mean temperatures from observation,'and those deriv- 

 ed from the calculations which follow, founded upon 

 analogy. By the application of this correction, the 

 temperature of April, latitude 78°, becomes 14°. 23, 

 and the mean of the year in the same proportion 

 exactly 17°*. 



The general results of all the observations on the 

 temperature of the Greenland sea, with the cor- 



* As 2° 1' (the difference of latitude between tJie April ob- 

 servations and 78°)j is to 3° (the correction of temperature), so 

 is 1° 15' (the difference between the mean latitude of the ob- 

 servations for determining the mean temperature of the year, 

 and latitude 78°), to r.86 (the correction of temperature for 

 the mean of the year.) 



