WIND ACTION 



145 



3. Brisk ; swaying branches ; blowing up dust. 



4. High ; blowing up twigs from the ground, swaying 

 whole trees. 



5. Gale ; breaking small branches, loosening bricks on 

 chimneys. 



6. Hurricane, or tornado ; destroying everything in 

 its path. 



Although the wind in its great paroxysms of rage is 

 sometimes very destructive, it is ordinarily a most beneti- 



A DUTCH WINDMILL. 

 Windmills are widely used to pump water. 



cent force. It is the circulatory medium for the earth ; as 

 the blood is for the animal and the sap for the plant. With- 

 out it the activities of the earth would stagnate. It spreads 

 over the land the water evaporated from the sea. It cools 

 the hot regions with the invigorating breath from the 

 mountains and the uniformly tempered sea. It warms 

 the cold places by bearing to them the heat taken from 

 the warm ocean waters and the parched places of the earth. 



