* ' 1 '^.^ 



PKOCEEDINGS 



OF THE 



CAMBRIDGE PHILOSOPHICAL 

 SOCIETY 



VOL. XIX. PART VI. 



[Easter and Michaelmas Terms 1919.] 





(JDambttligt: 



AT THE UNIVERSITY PRESS 



AND SOLD BY 

 DEIGHTON, BELL & CO., LIMITED, 

 AND BOWES & BOWES, CAMBRIDGE. 



CAMBRIDGE UNIVERSITY PRESS, 

 C. F. CLAY, MANAGER, FETTER LANE, LONDON, E.G. 4 



1920 

 Price Three Shillings and Siccpence Net 

 February 1920. 



