312 West and North-west Winds of New England. 
the south-west ; and a third, still higher, moving from the 
-east: the stream of air from the south-west having 
Sees forced from the surface by that which carried the 
thunder-cloud. 
The next morning, the degree of cold was strongly in- 
dicated by the brilliant white of Saddle mountain, covered 
with snow ; by the less perfect white of the Green Moun- 
tains, and the Taghkannuc ; and by the icicles, which, not 
less than ten inches in length, ' we saw depending from the 
eaves of the houses on our route. This intense cold was 
produced within the compass of little more than an hour ; 
during which time the north-west wind blew at the rate of 
from thirty to forty miles. The south-west wind of the 
preceding day was apvously a general wind ; and spread 
over a great extent of coun The weather throughout 
a whole of the preceding: simmer, and the autumn to that 
me, had been warm. A north-west wind, therefore, had 
temperature very little. The north-west air, which first 
visited Pittsfield, must have been that, which rested on the 
earth between this town and Albany ; the next hour, the 
volume between Albany and Johnstown; and the next, 
that between Johnstown and Whitestown. The whole of 
this division of the atmosphere cannot have differed senst- 
Bh fon. that, which we found at Pittsfield, when we arri- 
s case, the cold, if it had existed at all, as it 
rndee Rave as the result of a wind blowing, for a consid- 
erable length of time, and over a great extent of country, 
would have come on gradually. But the actual cold was 
instantaneous, and intense. The storm brought with 
snow and frost ; and deposited the whole mass of sm 
which on Saddle mountain must by the appearance five 
been from six to twelve inches deep, within the compas ass of 
anh es This wind, therefore, certainly came from the 
0 strongly marked. 
In Christmas day, in the year 1794, a fresh wind blew 
the south-east during the whole day, and was 50 warm 
