ORIGIN OF WAVES. 45 



surface of the sea into ripples, and then, acting with 

 ever -increasing power on the little surfaces thus 

 raised, blows them up into waves, and finally into 

 great billows. Sometimes, however, winds burst 



SCATTERED INTO FOAM. 



upon the calm ocean with such sudden violence that 

 for a time the waves cannot lift their heads. The 

 instant they do so, they are cast down and scattered 



