I 
PHILOSOPHICAL TRANSACTIONS 
oy THS 
ROYAL SOCIETY OP LONDON. 
Series A, VOL. 212, pp. 149-185. 
A NEW TREATMENT OP OPTICAL ABERRATIONS. 
BY 
R. A. SAMPSON, F.R.S. 
LONDON; 
PUBLISHED BY THE ROYAL SOCIETY, 
AND SOLD BY HAEEISON AND SONS, ST. AIARTIN’S LANE. 
DTJLAU AND CO., LTD., 37, SOHO SQUAEE, W. 
FEIEDLANDEE AND SON, BEELIN. 
1912. 
A 488. 
Price Two Shillings, 
27.7.12 
