^ ^ BRî 19 vt ^ 



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THE 



JOURNAL 



OF THE 



COLLEGE OE SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO. 

 Vol. XXXIV. 



'M -p. "^ m i^ m ^\i 'u 



PUBLISHED BY TtlE UNIVERSITY. 



TOKYO, JAPAN. 



1913—1916. 



TAISHO 2-3. 



