^ ^ i§ :^ <* f.5 



^è ^ 'W^ 



THE 



JOURNAL 



OF THE 



COLLEGE OE SCIENCE. 



IMPERIAL UNIVERSITY OF TOKYO, 



YOL. XI. 



m M -^^ ® ::fe ^ PP ^T 

 PUBLISHED BY THE UNIVERSITY. 



TOKYO, JAPAN. 



1898—1899. 



MEUr XXXI— XXXII. 



