PHILOSOPHICAL TRANSACTIONS 
OP THE 
EOYAL SOCIETY OF LONDON. 
Series A, Vol. 220. Pp. 137-173. 
ON INTENSITY RELATIONS IN THE SPECTRUM 
OF HELIUM. 
BY 
T. E. MERTON, D.Sc., 
LECTURER IN SPECTROSCOPY, UNIVERSITY OF LONDON, EJNG’s COLLEGE, 
AND 
J. W. NICHOLSON, F.R.S., 
PROFESSOR OF • MATHEMATICS IN THE UNIVERSITY OF LONDON. 
Printed and Published for the ROYAL SOCIETY by 
HARRISON AND SONS, 44-47, ST. MARTIN’S LANE, LONDON, W.C. 2. 
^rinter^ in Ordinary to igui 
1919. 
Price Three Shillings and Silence. 
A 575. 
28.12.19 
