The Rev. H. Lloyd on the Meteorology of Ireland. 467 



same point; in half it veered from 4 to 6 points of the compass, the veering 

 being in the direction produced by a cyclone moving from S. W. to N. E., and 

 having the path of its centre to the north of the island. 



3. The axis of the gale is in some cases transferred parallel to itself, to the 

 eastimrd. Remarkable instances of this movement occur in the gales of January 

 12, 13, and December 20. 



4. The least barometric pressure occurs, in almost every instance, in the 

 north-western quarter of the island.* 



5. The locality of the highest wind sometimes coincides with that of least 

 pressure., and sometimes does not. In the latter case, the axis of least pressure 

 is generally to the westward of the axis of the storm. 



6. On either side of the axis of a storm, the wind appears to blow towards 

 that line. A remarkable instance of this phenomenon occurred in the storm of 

 January l.f 



We are now in a position to consider the question, whether all storms 

 are cyclonic ? And if not, what proportion do rotatory storms bear to the 

 whole ? Of the greater storms which have occurred since the commencement 

 of these observations, the rotatory character of five (those of October 6, 1850, 

 November 18, January 15, 1851, March 18, and September 29) has been 

 completely established. We have seen in this section, that the same character 

 may be predicated, with great probability, of five more ; while there remain 

 five in which the wind has blown, throughout, in the same direction. In fifteen 

 months, accordingly, there have occurred fifteen storms, of which two-thirds 

 were cyclonic. As respects the remaining one-third, the phenomena are cha- 

 racterized, not only by the absence of any veering of the wind, but also by the 

 fact, that the pressures appear to increase with the distance from a line or axis 

 of minimum pressure, rather than from & point; or, in other words, that the 

 isoharic lines are parallel right lines, instead of concentric circles. It is true 



• In one case only, the locality of least pressure shifted from the north- western to the north- 

 eastern extremity of the island. This is consistent with the supposition, that the storm in question 

 was a cyclone, whose centre had a progressive motion eastward. 



t The conclusions numbered 3, 5, 6, have already been drawn by Mr. Espt, from an exa- 

 mination of the storms in the United States in the early months of the year 1843. — First Report 

 on Meteorology. 



VOL. XXU. 3 P 



