Vol. XVII, Article 7. 



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SB s» - 



i f 't t i 't i 



THE 



JOURNAL 



OF THE 



COLLEGE OF SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO, 

 JAPAN. 



m m # m * * pp *t 



PUBLISHED BY THE UNIVERSITY. 



TOKYO, JAPAN. 



1902. 



MELjI XXXV. 

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