^>. 7^ ^ :K 



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m 



T H E 



JOURNAL 



OF THE 



COLLEGE OE SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO. 



Vol. XXIX. 



■M M '"t m -ic <^ pp ff 



PUBLISPIED BY THE UNIVERSITY. 



TOKYO, JAPAN. 



1912-1914. 



MEIJI XLV— TAISHO III. 



