PHILOSOPHICAL TRANSACTIONS 
OF THE 
ROYAL SOCIETY OF LONDON. 
Series A, Vol. 216. TITLE, &c. 
TITLE, CONTENTS, INDEX, &C. 
A, YOL. 216. 
LONDON: 
PUBLISHED BY THE ROYAL SOCIETY, 
AND SOLD BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
printers tn Or&marg to iHajoSty. 
1916. 
A 548. 
-Price Sixpence. 
3.7.16 
