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



45.! 



force of the gale, at Dublin, took place between 1 p ii. and 2 v. m. ; at Killiney 

 it occurred between 5 p.m. and 6 p.m. There is a similar interval between the 

 times of minimum pressure at the two places, the least height of the barometer 

 occurring later at Killiney than at Dublin by two or three hours. These differ- 

 ences are probably connected with the difference of altitude of the places of 

 observation. 



1851. Jan. 15, 16. — A remarkable case of a double cyclone with storm, and 

 a double minimum of pressure. (Plate ix. Figs. 4, 5, 6.) The first of the two vor- 

 tices crossed the island from S. to N. on the 15th, and the second traversed the 

 north-western portion of it, from S. W. to N. E., on the following day. The 

 velocity of the former is not well determined ; that of the latter is about 270 

 miles per diem. The mean velocity of the wind was from 30 to 35 feet per se- 

 cond on the former day, and from 55 to 60 on the latter.* 



Jan. 15, A.M. — Centre of vortex about 20 or 30 miles south of Dunmore. 



• The following extra observations were taken at Markree, January 15, 16. 

 barometer to sea-level = O'lGl inch: — 



Reduction of 



