PHILOSOPHICAL 
TRANSACTION S 
OF THE 
EOYAL SOCIETY 
OF 
LONDON. 
FOR THE YEAR MDCCCLXXXII. 
VOL. 173—PART IV. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
printers m ©rbhrarg in °§tx 
MDCCOLXXXIII. 
