PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
ROYAL SOCIETY 
OF 
LONDON. 
FOR THE YEAR MDCCCLXXVIII. 
VOL. 169.— PART I. 
LONDON : 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
printers hi Orbhtarg Icr Utajxstg, 
MDCCCLXXVIII. 
