Vol. XVII, Article 10. 



W "t- -tr » 88 ■+• $ß 



THE 



JOURNAL 



OF THE 



COLLEGE OF SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO, 



3C M ifr IB ± * PP *T 

 PUBLISHED BY THE UNIVERSITY. 



TOKYO, JAPAN. 



1902. 



MEIJI XXXV. 



