IK- 
PHILOSOPHICAL TRANSACTIONS 
OF THE 
ROYAL SOCIETY OE LONDON. 
Series A, Vol. 221. Pp. 139-162. 
< '%4i 
THE STRESS-STRAIN PROPERTIES OF NITRO-CELLULOSE 
AND THE LAW OE ITS OPTICAL BEHAVIOUR. 
BY 
Prof. E. G. COKER, F.R.S., 
AND 
K. C. CHAKKO, M.Sc., 
UNIVERSITY COLLEGE, LONDON. 
PA 
Printed and Published for the ROYAL SOCIETY by 
HARRISON AND SONS, Ltd., 44-47, ST. MARTIN’S LANE, LONDON, W.C. 2. 
$rmteto tn Ortfuiarg to ^lajctftg. 
1920. 
{'PF' Price Four Shillings. 
586 . 
- 
18.10.20 
