3 
The maximum temperature in the 12 months was 78° on 
July 9th. 
The minimum temperature in the 12 months was 9°*5 on 
December 19 th. 
( x ) From Tables by Dr. Dalton, Society’s Memoirs, Vol. 
III. (new series), p. 494, and Vol VI., p. 572. 
( 2 ) The mean of August, 1769, was 55 o, 0. 
( 3 ) The mean of September, 1803, was 5 1 °*7 ; 1807, 50°. 1. 
( 4 ) The mean of the year 1795 was 46 0, 4 ; of 1799, 44°*6 ; 
of 1814, 45°*4 ; and of 1815, 46°-2. 
Mr. Atkinson stated that during the months of June and 
August, he had observed the extraordinary rain-fall of 13 
inches at Thelwell. The fall in July was not considerable. 
Mr. Dyer having stated that on the morning of August 
11th, a very loud explosion was heard in the neighbourhood 
of Blackfriars, London, the sky being clear at the time, 
a conversation took place on the subject of fire-balls and 
meteorites, in the course of which Mr. Ekman stated that 
during a most violent thunderstorm, passing over a tract of 
land intersected by a rapid stream, he had distinctly seen fire- 
balls, the diameter of which he estimated at 2ft., projected 
from the clouds down into the water. The distance of the 
point where he stood, from the point at which the balls struck 
the water, could not have been more than 150 to 200 yards. 
The phenomenon was witnessed in Sweden many years ago. 
Mr. Wild exhibited the universal or alphabet telegraph of 
Professor Wheatstone, and pointed out the successive improve- 
ments which had resulted in this admirable invention. 
A Paper, by Arthur Cayley, F.R.S., &c., Hon. Mem., 
was read by the Rev. T. P. Kirkman, entitled, “ On the 
A faced Polyacrons, in reference to the Problem of the Enu- 
meration of Polyhedra.” 
