THE 
SCIENTIFIC PROCEEDINGS 
OF THE 
ROYAL DUBLIN SOCIETY. 
Vol. XI. (N.8.), No. 28. FEBRUARY, 1908. 
ON THE 
SEPARATION AND QUANTITATIVE SPECTRA OF 
CERIUM, LANTHANUM, AND YTTRIUM. 
BY 
JAMES H. POLLOK, D.Sc., 
AND 
MG Ac LEONARD, ARG, Sub, 
ROYAL COLLEGE OF SCIENCE, DUBLIN, 
(PLATES XXI.-XXIII.) 
[Authors alone are responsible for all opinions expressed in their Communications, | 
DUBLIN: 
PUBLISHED BY THE ROYAL DUBLIN SOCIETY, 
LEINSTER HOUSE, DUBLIN. 
WILLIAMS AND NORGATE, 
14, HENRIETTA-STREET, COVENT GARDEN, LONDON, W.C. 
1908. 
Price One Shilling. 
