m 



s. Xakamura and K. Honda. 



July 14, 19C4. 



Point XE. 



46»* 



ûC" 



5'* 



Fi°r. 29 a. 



10m 



Point XW. 



4Cm 



Fiff. 29 b. 



lC«i 



^^-a/vvvwvvw\/vWV^VMMa"Aaa/vvv'^ 



■/öm 



Point SE. 



ô6™ ô't 



Fiff. 29 c. 



IC^ 



TABLE 40. 



N W 



52.S sec. X 13 



31.1 sec. X 18 



N E 





33.2 X 21 

 32.4 X 19 



S E 



51.7 X 22 

 53.6 X 14 

 52.0 X 15 



32.4 < 20 



Mean 



52.3 sec. 



32.3 sec. 



Experiments with a model of tlie pond showed that the motion 

 •with the longer period of 52.3 sec. is the uninodal seiche executing 

 its horizontal motion nearly parallel to the meridian. Taking the 

 mean depth /i=1.5 metres, and the length L=98 metres, the 



