THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Tol. XIII. (I.S.), lo. 15. PEEEUART, 1912. 



ON THE VACUUM TUBE SPECTRA OF THE 

 VAPOUES OF SOME METALS AND METALLIC 

 CHLORIDES. Part L— CADMIUM, ZINC, THAL- 

 LIUM, MERCURY, TIN, BISMUTH, COPPER, 

 ARSENIC, ANTIMONY, AND ALUMINIUM. 



BY 



JAMES H. POLLOK, D.Sc, 



KOYAL COLLEGE OF SCIENCE FOE IRELAND, DUBLIN. 



(PLATES XV. and XVI.) 

 [A uthors alone are responsible for all opinions expressed in their Communications-^ 



DUBLIN : 



PUBLISHED BY THE ROYAL DUBLIN SOCIETY^ 



LEINSTER HOUSE, DUBLIN. 



WILLIAMS AND NORGATE, , ,mm^ 



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1912. 





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