PHILOSOPHICAL 
TRANSACT 
OP THE 
ROYAL SOCIETY 
OF 
LONDON. 
FOR THE YEAR MDCCCLXXXII. 
VOL. 173—PART I. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
|)rinters m ©rbimirg to prr UTajxstg. 
MDCCCLXXXII. 
