PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
ROYAL SOCIETY 
LONDON. 
FOR THE YEAR MDCCCLXXIX. 
VOL. 170.-PART IT. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
Printers in (Drbiuarn to prr Utajrstg. 
MDCCCLXXX. 
