i). NâT^mù'ra and K. Honda, 



jourycTcoll, Vol. XXVIII., Art. Ö, HI. /A. 



Fiff. 1. 



Hakoné lake, ti=1.67 sec. 



Fig. 2. 



Hakoné lake, ^1=0.69860. 



Hakoné lake, 1^=0.44 sec. 



