PHILOSOPHICAL 
TRANSACTIONS 
OP THE 
ROYAL SOCIETY 
OP 
LONDON. 
FOR THE YEAR MDCCCLXXXIY. 
VOL. 175.—PART II. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
printers in (Drbitrarg to f},er Utajcstg. 
MDCCCLXXXY. 
