30 



dent ; but I deferred laying them before the Academy, until 

 I could combine with them the observations made in other 

 parts of Ireland according to the system recently organized. 

 The following are the observations of the direction of the 

 wind, and of the height of the barometer (reduced to 32° 

 Fahr.),* at all the stations from which the results have been 

 as yet forwarded to the Academy. The hours of observation 

 are 9 a. m. and 9 p. m. 



Station. 



Lat. 



Long. 



Height of Barometer. 



Direction of Wind. 



18, P. M. 



19, A.M. 



19, P. M. 



20, A. M. 



18, P. M. 



19, A. M. 



19, P. M. 



20, A. M. 



Portrush. . . . 



55° 13' 



6° 41' 



29-100 



28-339 



28-518 



29-044 



S.E. 



S.E. 



N.E. 



N.E. 



Buncrana, . . 



55 8 



7 27 



29-094 



28'300 



28-500 



29-061 



S.S.E. 



S. 



N.E. 



N.N.E. 



Killybegs, . . 



54 38 



8 27 



28-928 



28-242 



28-650 



29-150 



S.E. 



N. 



N. 



N. 



Donaghadee, . 



54 38 



5 33 



29-131 



28-376 



28-346 



28-937 



S.E. 



S. 



N.E. 



N.E. 



Armagh, . . . 



54 21 



6 39 



28-782 



27-975 



28-298 



28823 



S.E. 



S.S.E. 



N.W. 



N.N.W. 



Markree, . . . 



54 12 



8 26 



28-656 



28-126 



28-536 



29-088 



S.E. 



N.N.W. 



N.W. 



N.W. 



Dublin, . . . 



53 21 



6 15 



29-105 



28-362 



28-528 



28982 



S.S.E. 



S. 



W. 



N.N.W. 



Courtown, . . 



52 39 



6 13 



29-192 



28-566 



28-562 



28-924 



ss.w 



s.s.w. 



w.s.w. 



N.N.W. 



Kilrush, . . . 



52 38 



9 30 



28-830 



28-455 



28-706 



29-267 



S.E. 



W.N.W. 



W.N.W. 



N.W. 



Dunmore, . . 



52 8 



6 59 



29-070 



28-593 



28-633 



28-993 



S.W. 



w. 



W.N.W. 



N.W. 



Caherciveen, . 



51 56 



10 13 



28-855 



28-756 



29-080 



29-370 



s.w. 



W.N.W. 



W.N.W. 



N. 



Castletownsend, 



51 33 



9 9 



29-115 



28-831 



28-940 



29-207 



S.W. 



N.W. 



W. 



N. 



" It will be seen from these observations that, at 9 a. m. 

 of the 19th, the wind was blowing from N. at Killybegs, and 

 from S. at Donaghadee ; that it was blowing from S. E. at 

 Portrush, and from N.W. at Castletownsend ; from S.S.E. 

 at Armagh, and from N.N.W. at Markree. The centre of 

 the vortex was therefore over Ireland at that time, and be- 

 tween the stations mentioned. 



" But the most satisfactory mode of discussing these obser- 

 vations is to lay down, on a map, lines in the direction of the 

 wind at the same moment of time at the several stations. It 

 is thus evident that these directions are, very nearly, tan- 

 gents to concentric circles, the common centre of the circles 



* " The reduction to the sea-level has not been applied. The heights of 

 the cisterns above the sea are small at all the coast stations. At Armagh 

 this height is 211-0 feet; at Markree 131-5 feet." 



