PHILOSOPHICAL 
TRANSACTIONS 
OF THE 
EOYAL SOCIETY OE LONDON 
Seeies a 
CONTAINING PAPERS OF A MATHEMATICAL OR PHYSICAL CHARACTER. 
FOR THE YEAR 1897. 
VOL. 190. 
PRINTED RY HARRISON AND SONS, ST. MARTIN’s LANE, W.C., 
Drintirs iit ^rbiuarg to Pir Pajtsig. 
1898. 
