ON THE METEOROLOGY OF IRELAND. 



MEAN FORCE OF THE WIND FOR THE SUMMER AND WINTER 

 HALF-YEARS, AND FOR THE WHOLE YEAR. 



If, to eliminate local irregularities, we combine the preceding 

 results in groups, according to the arrangement hereafter described, 

 we find the following values for the mean forces of the entire 

 year: 



North-east, . . 1'64. North-west, . . 1-94. 



South-east, . . 1-61. South-west, . . 2-00. 



From this it appears that the mean force of the wind is consider- 

 ably greater in the icest of the island than in the east, the ratio 

 being somewhat greater than that of 1 '2 to 1. There is but little 

 difference between the forces in the northern and southern portions 

 of the island. 



CYCLONIC MOVEMENTS. 



In analyzing the phenomena of rotation, the first step was to 

 note those cases in which the mean directions of the wind, in any 

 two districts, differed by 90, or upwards. It was soon perceived, 

 that no conclusion could be drawn as to a general movement of the 

 atmosphere, when the wind was very moderate, the direction being 



2 A 



