312 



WAVES OF THE SEA 



with the depth of water in the upper portion of 

 the channel varying from 1.5 inches to 3 inches 

 or 3.5 inches. 



The period on any one occasion i.e., for 

 a particular depth of water is proportional to the 

 wave-length. If the wave-lengths were propor- 

 tional to the distance run, for a particular depth 

 of water, then the distance run divided by the 

 period in seconds would be a constant .quantity. 



