PHILOSOPHICAL 
T R A N S A C 
OF THE 
T I O N S 
ROYAL SOCIETY OE LONDON. 
Series A 
CONTAINING PAPERS OF A MATHEMATICAL OR PHYSICAL CHARACTER 
FOR THE YEAR 1896. 
VOL. 187 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
printers in ©rbtiurrjr to gETajestj). 
1897. 
