^ ^ W^ P :fe 'P .?£ 



^ •+• A w p * ^ 



THE 



JOURNAL 



OF THE 



COLLEGE OE SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO, 



VOL. XV., PART I. 



m M ^ a ::'c * PP If 

 PUBLISHED BY THE UNIVERSITY. 



TOKYO, JAPAN. 



1901. 



MEIJI XXXIV. 



1^; 



