On the Arc Spectrum of Vanadium. 205 



Vanadium Arc Lines — continued. 



Kensington. 



Hasselberg. 



Rowland. 



Remarks. 



A. 



Int. 

 Max. 

 = 10. 



A. 



Int. 

 Max. 

 = 4-5. 



A. 



Int. 

 Max. 

 = 15. 



4894 -42 



1 



4894 -43 



2 



4894 -40 



3 





4900 -82 



2-3 



4900 84 



2-3 



4900 -82 



3 





04 -60 



3-4 



04-59 



3 



04-57 



5 





05-05 



1 



05-10 



1-2 



05-05 



3 





06 '05 



< 1 



06 '06 



1 

















07 05 



1 





08-90 



1 



08-92 



1 



08-88 



1 













13 28 



1 





16-46 



1 



16 '48 



1-2 



16-44 



1 













19 -17 



1 





22 -60 



1 



22 -60 



1-2 



22 '54 



1 





25 -87 



3-4 



25 83 



2-3 



25-84 



7 





32 23 



2 



32 '24 



2 



32 21 



3 





Beference to the foregoing table will show that the Kensington list 

 and Hasselberg's contain many lines in common which are missing 

 from Bowland's. This is probably due to the fact that the latter 

 used carbon poles, which furnish so many lines themselves that it is 

 extremely difficult to pick up all the lines really clue to the substance 

 volatilised on them. As an instance of this, in the region between 

 A 4130 and A 4216, throughout which the structure lines in the carbon 

 fluting which commences at the latter wave-length are most crowded, 

 Eowland records only eleven lines, whereas in the corresponding 

 region Hasselberg gives forty-nine, and the Kensington photograph 

 shows seventy-five. 



Taking Hasselberg's list as a basis we find that the few lines given 

 below occur only in his list. 





Lines 



given by Hasselberg only. 



Hasselberg. 









Remarks. 



A. 



Int. 

 Max. 4-5. 



3902-71 

 4116 -85 



4210- 55 



4211 - 02 

 4226 -78 

 4476 -06 

 4682 -09 



1 



1-2 



1 

 1 

 2 

 2 

 1 



\ Probably masked in the Kensington photograph by 

 J a broad line of Ag at A 4212 -1. 

 Probably masked by line of Ca at A 4226 "91. 



„ Ag at A 4476 '29. 



Q 2 



