456 



Sir J. Norman Lockyer. 



The Tables. 



In the following tables, in which the elements are arranged alpha- 

 betically, will be found the wave-lengths of all those lines which have 

 been observed as enhanced in the region examined. 



The first column gives the wave-lengths of the enhanced lines, the 

 second and third their intensities in the spark and arc respectively 

 (maximum intensity = 10), and the fourth column is devoted to 

 remarks. 



In the case of iron and copper I give in addition the wave-lengths of 

 the spark lines obtained by Herren Exner and Haschek* and Eder and 

 Valenta respectively.! 



Aluminium. 





Int. 



Int. 





X. 



in 



in 



Kemarks. 





spark. 



arc. 





3900 -68 



5 







Enhanced line of Ti at \ 3900 -68. 



4480 -00 



6 









4513 -20 



9 









4529 -80 



10 







Enhanced line of Ti at X 4529 *6. 



4663 70 



10 









Bismuth.% 





Int. 



Int. 





A. 



in 



in 



Kemarks. 





spark. 



arc. 





3846 -1 



3 









3849 -3 



5 









3864 -5 



8 









4079 '3 



8 









4081 '6 



2 









4245 -3 



3 









4259 "8 



10 









4272 -6 



3 









4302 -4 



9 







Enhanced Ti line at X 4302 *09. 



4308 '8 



2—3 







„ „ A 4308-60. 



4328 *6 



5 









4340 -7 



5 









4387 -0 



3 







Enhanced Ti line at X 4387 *01. 



4391 '6 



3 









* W. Marshall Watts, ' Index of Spectra,' Appendix J, p. 2. 

 f Ibid., Appendix H, p. 38. 



X The wave-lengths are only given to five figures, as greater accuracy cannot be 

 obtained owing to the great breadth and fuzziness of the lines. 



