PROCEEDINGS 



OP THE 



CAMBRIDGE PHILOSOPHICAL 

 SOCIETY. 



VOL. XV. PART IV. 



[Michaelmas Term 1909.] 



©ambriUge : 

 AT THE UNIVERSITY PRESS, 

 AND SOLD BY 

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



CAMBRIDGE UNIVERSITY PRESS, 

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



1910 

 Price Two Shillings and Sixpence 

 31 January, 1910. 



