PROCEEDINGS 
OF THE 
CAMBRIDGE PHILOSOPHICAL 
SOCIETY. 
VOLUME XVIL. 
OcTOBER 28, 1912—May 18, 1914. 
Cambridge : 
AT THE UNIVERSITY PRESS, 
AND SOLD BY 
DEIGHTON, BELL & CO. AND BOWES & BOWES, CAMBRIDGE. 
CAMBRIDGE UNIVERSITY PRESS, 
C. F. CLAY, MANAGER, FETTER LANE, LONDON, E.C. 
1914 
