424 



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



Table V. Mean Monthly Temperatuees at Dublin. 



It -will be seen from this Table, that the temperature iu the months of 

 January, February, and October, 1851, -was higher than the average temper- 

 ature, while, in November, it was considerably lower. The mean temperature 

 of the entire year was only 0°-3 above the average. 



The depression of temperature in the month of November is a remarkable 

 case of those non-periodic fluctuations to which the attention of meteorologists 

 has been drawn by Professor Dove. This fluctuation appears to have pro- 

 ceeded from north-east to south-west, and to have been nearly obliterated when 

 it reached the western coast of the island. At the northern and eastern sta- 

 tions the unusual cold began on the 24th day of the month ; at the southern 

 and western it commenced on the 26th and 27th. It reached its maximum 

 about the 30th, and ceased about the 3rd of December. When we compare the 

 mean temperatures of November and December at Killough, Dublin, Courtown, 

 and Dunmore, on the eastern coast, with those at Killybegs, Westport, Kilrush, 

 and Cahirciveen, on the western, we observe tliat the temperature of No- 

 vember is less than that of December by 3°-3 at the former stations, while the 

 defect is only 0°-6 at the latter. 



Upon a comparison of the mean yearly temperatures of the several stations, 

 we observe that those of the inland stations are in defect, as compared with the 



