^ m ^ 9 $? 



5- 'T>L- -ä- 



W- ^ m- 

 THE 



JOURNAL 



OF THE 



COLLEGE OF SCIENCE 



IMPERIAL UNIVERSITY, 



JAPAN. 



VOL. III. 



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BJ Vf? * H ^ 



PUBLISHED BY THE UNIVERSITY. 



TOKYO, JAPAN. 



1890. 



