PHILOSOPHICAL TRANSACTIONS 
OF THE 
ROYAL SOCIETY OE LONDON. 
Series A, Vol. 214, pp. 1-25. 
THE PREPARATION OF EYE-PRESERVING GLASS 
FOR SPECTACLES. 
Sir WILLIAM CROOKES, O.M., F.R.S. 
& 
LONDON: 
PUBLISHED BY THE ROYAL SOCIETY, 
AND SOLD BY HARRISON AND SONS, ST. MARTIN’S LANE. 
DULAU AND CO., LTD., 37, SOHO SQUARE, W. 
FRIEDLANDER AND SON, BERLIN. 
1914. 
A 509. 
5.2.14 
Price One Shilling and Sixpence. 
