W^ ip. îr^ ^ ^ 



m ^ ^ iZ ^r 



m f3 iè %■ M 

 THE 



JOURNAL 



OF THE 



COLLEGE OF SCIENCE, 



IMPERIAL UNIVERSITY OF TOKYO. 



Vol. XLIII. 



PUBLISHED BY THE UNIVEESITY. 



TOKYO, JAPAN. 

 1919—1921 



TAISHO 8-10. 



