204 



KEPOBT 1892. 



Stkontium (Arc Spectrum) — continued. 



* These lines form a series of triplets for which, in the formula 10*- =a — hn-" 



-c7i-\ a = 31030-64 for the first line, 81424-67 for the second, and 31610-58 for the 

 tJdrd, &= 122328, and (;= 837473. 



§ See Iron. || See Zinc. J See Cadmium. ^ See Calcium. 



Cadmium (Arc Spectrum). 

 Kayser and Runge (' Ueber die Spectren der Elemente,' Pt. IV. 



Berlin, 1891). 



