PHILOSOPHICAL 
TRANSACTION 
OF THE 
ROYAL SOCIETY 
OF 
LONDON. 
FOR THE YEAR MDCCCLXXXIII. 
VOL. 174—PART II. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
printers in ©rbimirn ta fjer glajestij. 
MDCCCLXXXIII. 
