50 
POPULAR SCIENCE REVIEW. 
drained, every wood that is cut down, and every bog that is re- 
claimed exercises a great influence on the climate of the country 
in the immediate neighbourhood ; so that, having regard to the 
great improvements of the soil which are in progress on all sides, 
it must be evident that, even in the short period that has elapsed 
since the last of these observations was taken, modifications may 
have arisen which, before many years are over, may cause the 
present means to be very far from representing the actual tem- 
perature of our Islands. 
