PHILOSOPHICAL 
TRA NSACTI 0N S 
OK THE 
ROYAL SOCIETY OE LONDON. 
Series A. 
CONTAINING PAPERS OF A MATHEMATICAL OR PHYSICAL CHARACTER. 
VOL. 214. 
LONDON: 
PRINTED BY HARRISON AND SONS. ST. MARTIN’S LANE, W.C., 
printers hr ®rbinarg to Bis Utajtstg. 
December, 1914. 
