PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
EOYAL SOCIETY OE LONDON 
Series A 
CONTAINING PAPERS OF A MATHEMATICAL OR PHYSICAL CHARACTER. 
VOL. 195. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
IPrinters in (Drbinarg to fur Utajestg. 
January, 1901. 
Price Twenty-seven Skillings. 
