296 AIR. 



temperature^ produced) another obstacle 

 is offered to the uniform direction of the 

 wind. 



Q. Why is not the WATER of the sea made so 

 HOT by the vertical sun, as the surface of the LAND ? 



A. 1st Because the evaporation of 

 the sea is greater than that of the land : 



2ndly The waters are never still : and 



3rdly The rays of the sun strike into 

 the water, and are not reflected from its 

 surface, as they are by land. 



Q. Why does the EVAPORATION of the sea 

 prevent its surface from being HEATED by the vertical 

 sun? 



A. As water absorbs heat by being 

 converted into vapour ; the surface of the 

 sea is continually losing heat by evapora- 

 tion. 



Q. How does the MOTION of the sea prevent its 

 surface from being HEATED by the vertical sun? 



A. As one portion is heated it rolls 

 away, and is succeeded by another ; and 

 this constant motion prevents one part of 

 the sea from being heated more than 

 another. 



Q. How is the WIND affected by the SEA? 



