68 



S. Nakamura and K. Honda. 



Figs. 14 and 15, give specimens of the curves obtained at the several 

 stations at two different speeds of the clockwork, and as the curves 

 are drawn on the natural scale, they show how the amplitudes were 



Sept. 3-4, 1902. 



22h 



6»Ä 2'i- 



Yamanaka 



rig. 15 a. 



22''' 



O"» 



Ipponyanagi. 

 Fis- 15 b. 



4h 



22'!' 



Qh 



^'' 



Arai. 

 Fiff. 15 c. 



4h 



everywhere very small, and how difficult it was to determine the 

 periods of the seiches and compare the phases at the several stations. 

 The periods observed are of three kinds : 



TABLE 32. 



Yamanaka 



15.60x5 

 15.63x6 



10.58x1 

 10.90x1 



10.40x2 



5.50x15 

 5.56 X 1 

 5.30 X 5 

 5.66 X 1 



Nagaiké 



Arai 



Ipponyanagi 





In this table, the periods are expressed in minutes, followed by the 

 number of times they were observed. The weighted means give 



