PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
KOYAL SOCIETY OE LONDON 
Seuies a. 
CONTAINING PAPERS OF A MATHEMATICAL OR PHYSICAL CHARACTER. 
VOL. 198. 
LONDON: 
PRINTED BY HARRISON AND SONS, ST. MARTIN’s LANE, W.C., 
printers in (irbinarn In pis Pajesig. 
May, 1902. 
Price Twenty-eight Shillings and Sixpence. 
