PROCEEDINGS 
OF THE 
^ -ex 
Jiii J o^T ri 
.1? ?.yei 
CAMBRIDGE PHILOSOPHICAL 
SOCIETY. 
VOL. XI. PART IV. 
[Michaelmas Term 1901.] 
Cambridge : 
AT THE UNIVERSITY PRESS, 
AND SOLD BY 
DEIGHTON, BELL & CO. AND MACMILLAN & BOWES, CAMBRIDGE. 
C. J. CLAY AND SONS, AYE MARIA LANE, LONDON. 
1902 
Price Two Shillings and Sixpence. 
5 Feb. 1902. 
