ON THE METEOROLOGY OF IRELAND. 361 



however, not distinctly marked, probably owing to the influence of 

 the second cyclone. Least pressure at Buncrana. Velocity of wind 

 uniform throughout the island. 



Jan. 16, 9 A. M. Centre of second vortex to the south-west of 

 Westport. Least pressure at Westport. 



Jan. 16, 9 P.M. Centre about 20 miles west of Buncrana. 

 Absolute minimum of pressure (= 28'671) at Buncrana ; increase of 

 pressure = 0'20 inch. 



Jan. 30, 31. A very interesting cyclone traversing the western 

 portion of the island, in direction from N. to S. nearly, at the rate 

 of about 150 miles per diem. The wind light, the mean velocity 

 being about 20 feet per second. 



Jan. 30, 9 p. M. Centre of vortex over north-western portion 

 of the island, a little to the north of Killybegs. Least pressure at 

 Killybegs. Maximum velocity of wind (in south-west) = 40 feet 

 per second. 



Jan. 31, 9 A. M. Centre a little to the eastward of Westport. 

 Absolute minimum of pressure (=29*032) at Westport ; increase of 

 pressure = 0*10 inch. Maximum velocity of wind (in south-west) 

 = 25 feet per second. Lightning observed in north in evening of 

 this day and day preceding. 



March 18. A cyclone, with storm, traversing the island from 

 S. to N., at the rate of about 200 miles per diem. 



March 18, 9 A. M. Centre of vortex near Markree. Absolute 

 minimum of pressure (= 29 '328) at Armagh ; increase of pressure 

 = 0-10. Mean velocity of the wind = 45 feet per second ; greatest 

 do. (west coast) = 50 feet. 



March 18, 9 p. M. Centre of vortex north of the island. Ab- 

 solute minimum of pressure (= 29-371) at Portrush ; increase of 

 pressure = 0'13 inch. Mean velocity of the wind = 35 feet per 

 second ; greatest do. (north-west) = 50 feet. 



March 19, 9 A. M. Rotatory movement broken up, and wind 

 lessened. Barometer fell, and wind rose again to a gale in the 

 evening ; greatest velocity (north-west) = 65 feet per second. 



March 25. A distinct rotatory movement at 9 A. M. of this 

 dav, the centre of which was ;i liHl<> 1<> tin- north "f 



