PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
EOYAL SOCIETY OE LONDON. 
Series A 
CONTAINING PAPEES OF A MATHEMATICAL OP PHYSICAL CHAEACTEP. 
VOL. 201. 
LONDON: 
nilNTED BY HARRISON AND SONS, ST. MARTIN’s LANE, W.C., 
l^rintirs in fi^rbinarg to '§is |fiaifstg. 
August, 1903. 
