•a ^ S^ HH ^ 



iri (^ ËS yv »^ 



m :^ m P^ 



» K 5ê X «■ =^ K *« 



T H E 



JOURNAL 



OF THE 



COLLEGE OE SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO. 

 Vol. XXIX., Art. 2. 



m ^ ^ ^ -A ^ pp ff 



PUBLISHED BY THE UNIYERSITY. 



TOKYO, JAPAN. 



1912. 



MEIJI XLV. 



