ON WAVE-LENGTH TABLES OF THE SPECTRA OF THE ELEMENTS. 285 



Table op Standaed WAVE-LE'SGTHS—cnniinned. 



* First line in first head of cyanogen band (0). 



■f First line in second head of cyanogen band (6). J Cobalt line measured. 



§ Seven or eight lines, the brightest and most of the others due to Fe. 



