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reached 36 Ibs. per foot; and it had sufficient force to blow down the spire 
of Chichester Cathedral. 
According to Dove’s theory, these two storms are supplements to 
the storm of the 9th, and not distinct cyclonic movements. 
Limerick.—tI have ascertained from a respected correspondent in this 
city, that the barometer was rising slowly and steadily on the 8rd and 
4th; during the night of the 4th it rose rapidly, and on the morning of 
the 5th it was over 30-5 inches. On the evening of the 5th, it began 
to fall, and continued to do so until the 9th, when the storm occurred 
at Dublin, at which time the barometer in Limerick stood at 29 inches. 
There was no storm felt in‘Limerick. It thus appears that the atmo- 
spheric curve in Dublin was the inverse of that in Limerick; and that on 
the mornings of the 5th and 9th there was a difference of pressure in 
these cities ‘of above one inch, in opposite directions. Although the ba- 
rometer in Dublin or Limerick alone would not have enabled an ob- 
server to predict a storm, yet any person acquainted with the condition 
of the barometer at both places might fairly have expected rough 
weather from the N. E., such as actually occurred on the morning of the 
9th of February, in Dublin. 
Mr. Haughton then read to the Academy the following letter from 
Mr. Robert H. Scott :— 
“13, Suffolk-street, February 22, 1861. 
“‘Drar Mr. Haventon,—I see by your remarks at the last Meeting 
of the Royal Irish Academy, that it is your opinion that the storm of the 
9th instant could not have been predicted from observations of the ba- 
rometer here in Dublin. I think, therefore, that it may interest you to 
compare the behaviour ofthe barometer and thermometer in the British 
Islands during the past month with the records of their behaviour 
throughout Europe in seasons similar to the present. You are aware 
that Professor Dove, in his Law of Storms (Berlin, 1857), whom I 
quoted in a letter to ‘Saunders’ News-Letter,’ on the 12th, classifies all 
storms under three heads. 
“‘T, Cyclones.—Arising within the zone of the trades from the in- 
terference of the return with the normal current. 
“TI. Gales.—Arising outside these limits, from the meeting of the 
two currents (equatorial and polar) blowing in directions opposite to 
each other. 
“TIT. Gales arising from the lateral interference of these currents 
when they are, as is frequently the case, flowing in directions opposite 
to each other in parallel channels. 
“The first class is fully treated of by the late General W. Reid. 
Cyclones are always preceded by a fall of the barometer; and the direc- 
tion of the wind chalets according to fixed laws during their continu- 
ance. 
“The second alee cannot be predicted by insulated observations at 
any one point, but requires a large amount of data obtained from loca- 
lities scattered over a wide area of country. They are indicated by the 
co-existence of a high barometer and low thermometer over the eastern 
