399 
Mr. Frith and Professor Hennessy expressed a hope that Professor 
Galbraith would communicate the observations of temperature and ba- 
rometric pressure made within the same period. 
Mr. Yeates stated that his observations of rain-fall coincided very 
exactly with those of Professor Galbraith. In connexion with the fact of 
the minimum of monthly rain-fall occurring in February, he remarked 
that the annual minimum of temperature occurred, with remarkable re- 
gularity, in the middle of the same month. 
The Rey. Samuel Haughton read a paper ‘‘ On the Evaporation and 
Fall of Rain at St. Helena, Dublin, and Enniskillen, during the year 
1860.” 
Dr. Sidney, Mr. Frith, and Mr. James Haughton made some obser- 
vations on that part of Mr. Haughton’s paper which referred to the 
water supply of the city of Dublin. 
Professor Hennessy expressed a doubt as to the perfect accuracy of 
the method employed by Mr. Haughton to estimate the difference be- 
tween rain-fall and evaporation. 
Mr. Haughton briefly replied. 
The Rev. SamvEt Haveuton, F.R.8., Fellow of Trinity College, 
Dublin, read a paper— 
© 
ON THE STORM OF THE 9TH OF FEBRUARY, 1861. 
On the 11th instant I expressed to the Academy my opinion, that the 
disastrous storm of the 9th instant was not a Cyclone, and that its oc- 
currence could not therefore be predicted from barometrical observations 
made in a single locality. Further inquiry into the circumstances of 
this storm shows that this opinion was correct, and that it constitutes an 
admirable example of Dove’s second kind of storm, outside the limits of 
the Trade winds (Ueber das Gesetz der Stiirme, p. 48.) In this class 
of storms, there is a direct opposition between the S. W., or equatorial 
current, and the N.E., or Polar current, of air; there is generally a 
succession of non-cyclonic gales, N. E. and 8. W.; and when the 8. W, 
wind gives place to the N. E., there isa rising barometer and minimum 
temperature corresponding to the time of the storm. The following 
facts place the peculiar and non-cyclonic character of this storm beyond 
all doubt. 
Dublin.—In this city a wave of atmospheric pressure occurred, of 
8 days, 4 hours’ duration, the two crests of the wave being— 
Ist crest, Feb. 14 22°; Barom. = 30°70 in. 
2nd crest, Feb., 10? 25; Barom. = 30°48 in. 
And the hollow of the wave being— 
Feb. 65° 2"; Barom. = 29:00 in. 
The gale or storm occurred of maximum violence,—= 
Feb. 9° 22", velocity 24 miles per hour. 
