m ^ ^ :fe # 15 ^ 



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IS R 3ê -t- W 



THE 



JOURNAL 



OF THE 



COLLEGE OF SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO, 



Vol. XXVII. 



^ ff. ^ m :k ^ ^\i n 



PUBLISHED BY THE UNIVERSITY. 



TOKYO, JAPAN. 



1909— 1911. 



MEIJI XLII-XLIV. 



