452 



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



nomena — the lull of the wind, and the sudden reversal of its direction — whicli 

 are observed to occur at places in the path of the centre of a cyclone. I shall 

 therefore briefly describe the series of changes at these two stations. The 

 observations at Armagh are taken from the records of the self-registering ane- 

 mometer, which were, of course, continuous; those at Markree were made at 

 short intervals. 



At Armagh the wind began to blow at 7 p. m. of the 18th, with a velocity 

 of 32 feet per second. The maximum velocity, with the exception of a short 

 squall* at 5 a. m., occurred at 7 a. m. of the 19th, and amounted to 43 feet per 

 second. From this time the wind abated rapidly almost to a calm, its velocity 

 at noon amounting only to 6 feet per second; but at 3 p.m. it rose again, with 

 a velocity of 22 feet. The initial direction of the gale was from the E. S. E. 

 From 9 p. m. on the 18th, to 1 a.m. on the 19th, it veered to S., at which point 

 it continued for several hours, including the period of greatest force of the 

 gale. At 11 A.M. its direction had returned to S.E., and it then suddenly 

 shifted to W. N.W., altering through 160' in 24 minutes. The minimum of 

 pressure took place at 11''- 30'"-, at the close of this movement; its amount 

 was 27-930 inches.f 



* During the squall, which lasted only three minutes, the velocity reached 90 feet per second. 



■f The following are the anemometric observations above referred to. The direction is mea- 

 sured from ,S. through W. to N. ; the velocity is expressed in miles per hour. On the 19th, from 

 4 A. M. to 8 A. M., the direction-registering pencil was thrown out of gear, but there appears to have 

 been no change of any magnitude in the interval : 



