P HIL O S O P HIC A L 
T R A N S A C T I 0 N 
OF THE 
OYAL SOCIETY OF LONDON 
Series A. 
CONTAINING PAPERS OF A MATHEMATICAL 01! PHYSICAL CHARACTER. 
VOL. 195. 
LONDON: 
PRINTED I3Y HARRISON AND SONS, ST. MARTJN’s LANE, W.O.. 
printers in ©rbinarg in pet UTajestj). 
January, 1901, 
