298 



PROCEEDINGS OF THE 



found to be rising, the minimum depression having occurred at 

 1 a.m. ; the wind also, which blew with considerable force during the 

 night, had almost entirely died away. Soon, however, the atmos- 

 phere assumed more gloomy indications. At 10 a.m. the 

 barometer again began to fall, and continued to do so till 5 p.m. 

 At the same time the wind, which was blowing from the south- 

 west, began to veer towards the south, and thence to south-east. 

 A little before 3 p.m. the wind suddenly returned to the south, 

 and commenced to blow violently and with increasing intensity. 

 At 3 p.m. the hourly velocity of the wind was 24 miles, at 3.30 it 

 was 42 miles, at 4 it was 42 miles, and 4.20 it was 60 miles. At 

 6 p.m. the velocity was also 60 miles, but at 7.10 it reached 72 

 miles, and again at 8 p.m. there occurred a gust which brought the 

 velocity up to 72 miles. This was the highest velocity attained, 

 so far as could be indicated by our measures. I do not entertain 

 the least doubt, however, but there occurred from time to time 

 sudden gusts of wind which attained a velocity of 90 miles an hour. 

 This is equivalent to a pressure of 40 lbs. on the square foot. On 

 the occasion of the great storm of January, 1868, the maximum 

 pressure, as indicated by Osier's anemometer, amounted to 42 lbs. 

 on the square foot. The conclusion at which I have arrived is that 

 the storm of last Sunday was somewhat less intense than the great 

 storm of 1868, but that it almost equalled it in this respect. 



" I subjoin some of the numerical results obtained from the 

 records of the anemograph, the barograph, and thermograph : — 



Anemograph. 



