PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
ROYAL SOCIETY 
OF 
LONDON. 
(B.) 
FOR THE YEAR MDCCCLXXXVrL 
VOL. 178. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
ws m ©rbirarg to Hajcstg. 
MDCCCLXXXYIII. 
♦ 
