* ä m a * » ab & 



3B SW- 



-t- -tr WI- 

 THE 



JOURNAL 



OF THE 



COLLEGE OF SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO, 

 JAPAN. 



! YOL. XVII., PART 2. 



tit i-^ %f s 



PUBLISHED BY THE UNIVERSITY. 



TOKYO, JAPAN. 



1902. 



MEIJI XXXV. 



