﻿Magnetic Rotation Spectra of Sodium Vapour. 523 



fact that the lines in the magnetic spectrum coincide with the 

 lines of the complex spectrum makes it seem certain that 

 the same series will be found there. By comparing the 

 various fluorescent spectra with the magnetic spectrum, and 

 by measuring carefully the distances between the lines of the 

 latter, I have made a provisional assignment of the magnetic 

 lines thus far observed into rive series. 



The wave-lengths and wave-length differences are given in 



the following 



tables : — 









First S fries. 



Foui 



utii Series. 



X. 





X differences. 



X. 



X differences. 



5119-34 





. . 39-50 

 . . 39.13 

 . . 39<)8 

 .. 38-67 

 . . 38-52 



52 1 . 

 5179-7] 



5140 71 



5025-66 



1 15-05 _ 



39-29 



5079-78 





39-00 



5040-1 i-j 

 5001-57 

 49(>2->5 

 4924-32 



.... 



38-35 











113-56 



37-86 



SfCOND 



Series. 





3 





X. 





X differences. 



491210 







5165-85 



5126-54 





. . 39-31 

 . . 39-23 



. . 38-82 



4837-49 



7I-tJi_ 



a 



109-97 _ 



3 



37-30 



5087-31 

 5048-49 





36-68 





77*64 



= 38-83 



4727-52 





34-98 



497085 





. 38-21 



F 4092-54 







4932 64 





. . 3S-06 



Fifth Ser 





4894-58 











75-15 



2 



= 37-57 



X. 



X differences. 



4819-43 



. . 36-54 



5225-34 

 5186-70 

 5147-50 





38-64 



4782-89 







39-20 





112-89 



= 37-63 





76 



38-00 



4670 " 



o 





5071-50 

 5033-54 



74-92_ 



38-00 

 37-46 



Third Series. 



4958-62 



- 





X. 





X differences. 





74-Sl_ 



37-40 



5211-71 



5172-82 





. . 38-89 

 . . 39-09 



. . 38-95 



4883-81 



73-65 _ 



36-82 



5133-73 



5094-78 





4810-16 



2 

 7T66_ 



35-83 





1 15-34 



= 38-45 



4738-5 







4979-34 



7.5-96 

 2 



= 37-98 



Extra Lenes. 

 5096-00 



4903-38 





. . 37-79 



50 



52-83 





4865-59 



113-55 



= 37-85 



5049-56 







3 



5003-12 





4752-04 





.. 36-41 



4964-39 

 4967-10 





4715-63 







