PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
ROYAL SOCIETY 
LONDON. 
FOR THE YEAR MDCCCLXXXII. 
VOL. 173.—PART III. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
. Ilrinlers in Orbiuarp to fur Utajxstg. 
MDCCCLXXX III. 
