PHILOSOPHICAL 
TRANSACTION 
OF THK 
ROYAL SOCIETY 
LONDON. 
FOR THE YEAR MDCCCLXXXIU. 
VOL. 174.-PART III. 
LONDON: 
PRINTED BV HARRISON AND SONS, ST. MARTIN’S LANK, \V.(\, 
printers in (Dibinarn to fier Utajishi. 
MDCCCLXXXIV. 
