Seiches in Some Lakes of Japan. 67 



§ 4. Yamanaka Lake. 



Yamanaka lake lies on the northeastern side of Mt. Fuji at 

 138°52' E. and 35°25' N., and belongs to the chain of lakes that 

 encircles the famous volcanic cone. Its length is about 5 kilo- 

 meters, its maximum width 2 kilometers, and its surface is about 

 980 meters above sea level. It is very shallow, the maximum 

 depth, as measured by us, being only 15 meters. 







-Là 



JKE YAMANAKA. 



Sept. 2, 1902. 









1 







1 



lih 



IQm 





21 

 Yamanaka. 



Fig 14 a. 



ia 





56^ 





1 







1 



nil 



26'« 





Nagaiké. 

 Fig. 14 b. 



^C™ 





56"' 



■ 











1 



24/. 



10'"- 





Ipponyanagi. 

 Fig. 14 c. 



20»- 





56'" 





—^-^ 













nh 



JC»> 





Arai. 

 Fig. 14 d. 



Z(jm 





36»' 



Four liranimeters of the " N " type were set up at the four 

 stations Yamanaka, Nagaiké, Arai and Ipponyanagi, and simul- 

 taneous records extending over three days were taken at them. 

 At the same time, we occupied ourselves with taking soundings of 

 the lake at different points, the result of which is given in Plate X. 



