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PHILOSOPHICAL TRANSACTIONS 
OF THE 
ROYAL SOCIETY OE LONDON. 
Series A, Vol. 221. Pp. 265-293. 
* 
..., A 
m J 
PLANE STRESS AND PLANE STRAIN IN 
BIPOLAR CO-ORDINATES. 
BY 
G. B. JEFFERY, M.A., D.Sc., 
FELLOW OF UNIVERSITY COLLEGE, LONDON. 
Printed and Published for the ROYAL SOCIETY by 
HARRISON AND SONS, Ltd., 44-47, ST. MARTIN’S LANE, LONDON, W.C. 2. 
Printer* tn ©rtrtuarg to $tajc*tg. 
1920. 
Price Three Shillings and Sixpence. 
690 . 
8.11.20 
