Mr. Cleaveland’s meteorological observations. 12} 
gust ; at which time we had frost on two successive nights. On the 
22d instant ice was formed two tehths of an inch thick. 
Doctor Holyoke, in his “ Estimate of the heat and eold of the A- 
merican atmosphere, beyond the European, in the same parallel of lati- 
tude,” suggests that this excess is in part attributable to the large num- 
ber of evergreens growing upon the continent. If this be true with 
regard to the continent at large, some particular sections of the coun- 
try, in which evergreens abound, may have an excess of cold above 
those parts of the same country, which have fewer evergreens. Sur- 
rounded as I am by trees of the aforementioned ese I Fea 
Pg" Lae f 
to pay further attention to this subject by obser vation and 
arene meenemaer 
_ Should: you think this short extract worthy ¢ of any other preserva- 
tion, than on your private files, it is at your command 
as well, as your friend and 
humble servant, 
PARKER CLEAVELAND, 
