60 B7PECTS OF rOEESTS ON HTJMIDITT. 



When the mountains are covered with forests of deciduous trees, 

 the great quantity of moisture" passed into the atmosphere by the 

 stotnates of the leaves may render the air more readily indicative of 

 any fall of temperature, but that is all. 



The phenomenon in question comes under consideration here solely 

 because this and the phenomenon of clouds surmounting woods are 

 generally referred to as indicative of an attractive power over clouds 

 being exercised by the one and by the other ; and it may be satis- 

 factory to some student of the meteorological effects of forests to see 

 that neither in the one case nor in the other is there any necessity to 

 call in the aid of some unknown, and consequently mysterious, power 

 of attraction to enable us to account for the phenomena observed. 



