122 FOREST INFLUENCES. 



over prairies, tliat the heavy windstorms — sucli as blizzards — do not 

 long survive the traverse across a forest area, etc., but these relations 

 still remain in the condition of hypotheses only. Forests also have 

 broad and important relations to the flow of water on the surface, to 

 the protection of movable soils, and to many other features of practical 

 importance. These are matters for discussion by engineers rather than 

 by meteorologists. 



