and Ireland, as influenced by the Gulf- Stream. 441 

 North Coast. South Coast. 



Londonderry 43*9 



Mullaghmore 44*6 



Donaghadee 43*1 



Mean 439 



Roches Point ....... 45*3 



Valentia 46*7 



Mean 460 



Excess of South over North coast 2 0, 1 



The mean temperature at Dublin was 43° # 6 ; whence, if 

 this may be taken as about the temperature of the East coast, 

 the North exceeded the East by 0*3. 



If we now compare the cold and warm periods, we observe 

 that both in Great Britain and Ireland the difference between 

 the Southern and Northern coasts was less in the warm period 

 than in the cold ; and the influence of warm currents was also 

 exhibited in the higher temperature of northern over eastern 

 stations at lower latitudes. The conclusion arrived at in my 

 former comparisons has been thus supported, and the influence 

 of the thermal currents surrounding these islands in modifying 

 the winters appears to be further confirmed. 



In a paper of General Sabine's, to which I have referred in 

 the communication printed in the Proceedings of the Royal 

 Society, he mentioned the winter of 1845-46 as exceptionally 

 mild. Some confirmation of the law I indicated may be de- 

 rived from some observations made during that winter on the 

 south-west coast of Ireland by Mr. Daniel O'Connell. The 

 results were communicated by the son of the illustrious orator 

 to the late Dr. Humphry Lloyd; and having consulted the 

 record, I found that Mr. O'Connell observed the temperature 

 daily at Darrynane Abbey for 106 days during the winter of 

 1845-46, from November to February ; on applying the cor- 

 rections recommended by Dr. Lloyd in his paper on the 

 Meteorology of Ireland, 1 found that the mean for the winter 

 at Darrynane Abbey was 4 7°. During the four winter months 

 referred to, the mean temperatures were as follows at other 

 stations : — 



Cork 47-5 



Dublin 46-3 



Swansea .... 44*4 



St. Heliers (Jersey). 46*4 



Orkney 41-8 



The winter of 1845-46 seems therefore to furnish an illus- 

 tration of the law of temperature-distribution already men- 

 tioned, and therefore of the influence of the heat-bearing 

 currents which wash the shores of these islands. 



