The Rev. H. Lloyd on the Meteorology of Ireland. 



435 



zone already mentioned, the mean excess in the Atlantic being 0°'83 Fahr., and 

 in the Great Ocean about half that amount. 



The present observations possess much interest in connexion with these 

 questions. In order to perceive their bearing, I have, in the Table which fol. 

 lows, given the half-yearly and yearly means of the sea-temperature at the 

 several stations, together with the differences between them and the corres- 

 ponding means of the temperature of the air. At Cushendall and Bunown no 

 observations of the temperature of the air were actually made ; and for these sta- 

 tions, consequently, the latter means are calculated from the isothermal lines. 



Table XIII. Temperature of the Sea (Yearly and Half-yearly Means). 



It appears from the last line of this Table, that the temperature of tlie sea is, 

 upon the mean of the entire year, 2 '0 higher than that of the air above the coast. 

 The excess is 3"'3 in winter, and 0'-7 in summer. There appears also to be 

 considerable diversity in the amount of the excess at the different stations ; 

 it is greatest, on the mean of the entire year, at Bunown, and least at Castle- 

 townsend. 



This excess of the temperature of the sea above that of the air furnishes the 

 explanation of the fact already noticed, — namely, the diminution of the temper- 

 ature of the air in proceeding from the coasts inland ; for it is obvious that the 

 air in the vicinity of the sea must have its temperature raised by contact with 

 the water. 



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