ON WAVE-LENGTH TABLES OF THE SrECTKA OP THE ELEMENTS. 371 



(Lesium. 



t Probably due to Lithium. — Liveing and Dewar, Proc. Roy. Soc. Feb. 27, 1879. 



Calcium. 



* Observed by Lecoq de Boisbaudran in the Spark Spectrum of Calcium Chloride solution. 



t The numbers attached as ' indices ' in this column denote the comparative ' lengths ' of the lines. 



X 4226 Mascart. § Origin doubtful —probably Iron lines. || Compare Titanium. 



Compare Chromium. 



ft See Strontium. 



B B 



