PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
BOYAL 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 Orhhrarn lo f)ir Ulnjeslg. 
1897. 
