PHILOSOPHICAL TRANSACTIONS 
OF THE 
ROYAL SOCIETY OE LONDON. 
Series A, Vol. 218. Pp. 395-440. 
f YP - r*3 \ 
MONOCLINIC DOUBLE SELENATES OF THE 
IRON GROUP. 
BY 
A. E. H. TUTTON, D.Sc., M.A., F.R.S. 
A 568. 
Printed and Published for the ROYAL SOCIETY by 
HARRISON AND SONS, 44-47, ST. MARTIN’S LANE, LONDON, W.C. 2, 
printers tn «9rtrtnarg to &aj«ftp. 
1919. 
Price Three Shillings. 
17.6.19 
