PEOCEEDINGS 



OF THE 



CAMBRIDGE PHILOSOPHICAL 

 SOCIETY. 



VOL. XY. PART 11. 



[Lent Term 1909.] 



AT THE UNIVERSITY PRESS, 

 AND SOLD BY 

 DEIGHTON, BELL & CO. AND BOWES & BOWES, CAMBEIDGE. 



CAMBEIDGE UNIVEESITY PBESS, 

 C. F. CLAY, MANAGER, FETTER LANE, LONDON, E.C. 



1909 



Price Three Shillings 

 May 21, 1909. 



