Vol. XVII, Article 9. 



ft m ia ^ * ne £- 



SI 3fr 



9 + -t » ? Jt, S 



THE 



JOURNAL 



OF THE 



COLLEGE OE SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO, 

 JAPAN. 



ÎÈl M # gl * ^ PP ft 

 PUBLISHED BY THE UNIVERSITY. 



TOKYO, JAPAN. 



1902. 



MEIJI XXXV. 



