PEOCEEDINGS 



OF THE 



CAMBRIDGE PHILOSOPHICAL 

 SOCIETY. 



, /iiLUoUrnioUl oL 



i - - - 



VOL. XV. PART III. 



[Eastee Term 1909.] 



^ambrfljge: 



AT THE UNIYERSITY PRESS, 

 AND SOLD BY 

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



CAMBRIDGE UNIVERSITY PRESS, 

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



1909 



Price Three Shillings 

 19 November, 1909. 



