PHILOSOPHICAL TRANSACTIONS 
OF THE 
ROYAL SOCIETY OE LONDON. 
Series A, Vol. 221. Pp. 199-237. 
REDUCTION OF ERROR BY LINEAR 
COMPOUNDING. 
W. F. SHEPPARD, Sc.IX, LL.M. 
Printed and Published for the ROYAL SOCIETY by 
HARRISON AND SONS, Ltd., 44-47, ST. MARTIN’S LANE, LONDON, W.C. 2. 
printer* in ©rtrmarg to j&aRtftjj. 
1920. 
Price Three Shillings and Sixpence. 
