94 



K. HONDA, T. TEK ADA, Y. YOSHIDA, AND D. ISITANI. 



Thus in these bays the periods of the sea waves are the 

 same as those observed in other sea waves and also in ordinary 

 cases. Only one exception is found in the bay of Aburatsubo 

 for Valparaiso wave the period of which is several times greater 

 than the period of free oscillation of the bay. 



The following tables contain the results of calculation for 

 the velocity of the sea waves through the Pacific. 



Ecuador Wave. 



Valparaiso Wave. 



From the above tables, it is easily seen that notwithstand- 

 ing the considerable distance travelled by these sea waves, the 

 velocities in the two cases fairly coincide with each other. In 

 comparing velocities of the same wave at different stations, it 

 wiU be observed that the velocity slightly increase with dis- 

 tance, though the mean depth of the ocean remains nearly 

 constant or rather decreases slightly. The exceptionally large 



