Soichûs iu Somo Lakes of ^ai)an. 



43 



T^= 3.90 Minutes, 



T5= 3.11 ,, 

 having the ratios 



TiiT^tTg/AiTs^l.OOO: 0.439:0.302: 0.254: 0.202. 

 Theseiche with the longest period of Ti = 15,38 minutes is 

 the uninoclal longitudinal seiche. The fact that we did not 

 observe this period at Hotokegasaki and Takogawa, which were 

 the two middle stations, must be interpreted to mean that these 

 places lie on or near the nodal line for this oscillation. This may 

 be shown also by comparing the phases at the two terminal stations, 

 Hakone and Umijiri. If we write down the times of high water, 

 from the records of the two stations, in which this particular 

 seiche of 15.38 minutes was excellently developed, we have 



TABLE 25. 



Hakoaé. 



Umijiri. 



Diff. 



11. m. 



h. m. 





17 18 



17 11 



7 minutes. 



38 



25 



8 



48 



40 



8 



18 3 



55 



8 



19 



18 11 



8 



This shows clearly enough the correctness of the above assertion. 

 The curves in Figs. 10 and 11, moreover, show this Avithout any 

 douljt. The dotted curves in there figures were obtained from 

 limnograms of these stations on the 29th, August 1901, by the 

 method before explained of graphically deducing simple curves 

 for 15.38 and G.7G minutes by previously magnifying them 



