PHILOSOPHICAL TRANSACTIONS 
OV THE 
/ 
ROYAL SOCIETY OE LONDON. 
Series A, Vol. 220. Pp. 207-245. 
I 
S 
ON THE FUNDAMENTAL FORMULATIONS OF 
ELECTRODYNAMICS. 
BY 
G. H. LIVENS, 
UNIVERSITY OF MANCHESTER. 
Printed and Published for the KOYAL SOCIETY by 
HAHEISON AND SONS, 44-47, ST. MARTIN’S LANE, LONDON, W.C. 2, 
PrintWiS tn ©ririnarg to ^ajcjStp. 
1920. 
Price Three Shillings a^nd Sixpence. 
A 677. 
17.3.20 
