a ee ne MET 
PROCEEDINGS 
OF THE 
CAMBRIDGE PHILOSOPHICAL 
SOCIETY. 
VOLUME VIL. 
OcTOBER 25, 1886—JUNE 3, 1889. 
Cambridae : 
PRINTED AT THE UNIVERSITY PRESS, 
AND SOLD BY 
DEIGHTON, BELL AND CO. AND MACMILLAN AND CO. CAMBRIDGE; 
BELL AND SONS, LONDON. 
1889 
