ON WAVE-LENGTH TABLES OF THE SPECTRA OF THE ELEMENTS. 313 



Wave-length Tables of the Spectra of the Elements and Gomiiounds. — 

 Refort of the Committee, consisting of Sir H. E. RoscoE (Chairman), 

 Dr. Marshall Watts (Secretary), Sir J. N. Lockyer, Professor 

 J. Dewar, Professor Gf. D. Liveing, Professor A. Schuster, Pro- 

 fessor W. N. Hartley, Professor Wolcott Gibes, and Captain 

 Abney. 



Iron (Spark Spectrum). 



Exner and Haschek : ' Sitzungsber. kais. Akad. Wissensch. Wien.,' cvi. 1897. 



The measurements of Kaj'ser and Runge are in the arc spectrum. 



