PHILOSOPHICAL TRANSACTIONS 
OF THE 
ROYAL SOCIETY OE LONDON. 
Series A, Vol. 217. Pp. 315-360. 
BAKERIAN LECTURE. 
ON X-RAYS AND THE THEORY OF RADIATION. 
BY 
C. G. BAKKLA, F.R.S., 
PROFESSOR OF NATURAL PHILOSOPHY IN THE UNIVERSITY OF EDINBURGH. 
LONDON: 
PUBLISHED BY THE ROYAL SOCIETY, 
AND SOLD BY HARRISON AND SONS, ST. MARTIN’S LANE, W.C., 
$rtnter$ in OrUtnarj) tn Si id iHaJes'tg. 
1917. 
A 557. 
Price Three Shillings. 
29.8.17. 
