PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
ROYAL SOCIETY 
OF 
LONDON. 
FOE THE YEAE MDCCCLXXXII. 
YOL. 173.—PAET III. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
|lrmtos in dD rimtarg tor pu* pajxstg. 
MDCCCLXXXIIT. 
