PRESENTED 
23 MAR. 1903 
PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
ROYAL SOCIETY OE LONDON 
Series A. 
CONTAINING- PAPEES OF A MATHEMATICAL OE PHYSICAL CHAEACTEE. 
YOL. 199. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN'S LANE, W.C., 
Printers fat ©rbhrarg to gris i^ajestg. 
November, 1902 . 
Price, Twenty-six Shillings. 
