THE 
SCIENTIFIC PROCEEDINGS 
ROYAL DUBLIN SOCIETY. 
Vol. XI. (N.8.), No. 16. JULY, 1907. 
INDEX OF THE PRINCIPAL LINES OF THE 
SPARK-SPECTRA OF THE ELEMENTS. 
BY 
JAMES H. POLLOK, D.Sc. 
(PLATES X. AND XI.) 
[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. 
1907. 
Price One Shilling. 
