Seiches. in. Some Lakes of Japan. 



77 



TABLE 34. 



Washizu 



Horié 



Ösaki 



37.3x1 



12.18x9 

 12.64x7 



11.72x1 



9.46x1 

 9.64x1 



8.74x1 



Thus the only motion apparently having any significance in this 

 lake is the one with a period a little greater than 12 minutes, 

 observed at Osaki nnd Horié. The period of 11.72 minutes once 

 observed at Washizu may also belong to the same motion. Assum- 

 ing this, the period of this motion is 

 12.34 minutes. 

 With a model constructed of cement, we could excite only 

 two motions, viz. a motion with a period of 1.15 sec, and another 



Paoi/fic Ocea/rv 



Fig. 20. 



with a period a little greater than 0.3 sec, but much smaller than 

 0.4 sec. Both were, however, very difficult to excite, and were 



