ON THK ULTRA-VIOLET SPECTRA OF THE ELEMENTS. 



247 



TABLE of Cobalt lines (continued). 



TABLE of Nickel lines. 



In the first two columns are given the intensities, 1 to 6, of the lines as observed in 

 the spark and arc respectively, 1 being the most intense. In the third column are 

 recorded the wave-lengths. A figure in the fourth column indicates that the wave- 

 length against which it is placed was directly measured by means of a grating, and 

 the figure records the number of separate determinations combined in the given 

 result. 



