WEATHER 



165 



Winds and Kains of July Northern S 



FIG. 140. Terrestrial Wind Belts in Summer and Winter. The Heat 

 Equator Lies in the Midst of the Equatorial Rain Belt. 



ern hemisphere and southeast in the southern hemi- 

 sphere. These winds are usually a part of the great whirls 

 known as cyclones and anti-cyclones and are subject to 

 frequent changes in direction. 



Cyclonic Winds. Because of the rotation and shape 

 of the earth, air flows toward a low pressure area by a 



