﻿Spectrum of Palladium. 157 



Certain regularities exist, however, and ought not to be 

 passed without mention. The lines in the groups 5 and 13- 

 are divided in the following way * : 



fA(6R)Tripl. +154 -153 

 I B- 

 Gr0Up *\ C(9E)Tripl. +1-54 -1-55 



I D (7R) Quadr. +219 4-1-05 -105 -219 

 fA(9R)Tripl. +1-50 -1*53 

 I B (6R) Quadr. +2'24 +0-84 -0-84 -2-25 

 Gr ° Upl3 jc(4R)Tripl. +1-53 -1-54 

 I D (7R) Sep. unknown. 



The first and the third lines in both these groups become 

 triplets with identical values of — for all the lines. The 



A. 



second and fourth lines are divided into four constituents 



each. If also here the values of r-y are the same, cannot be 

 determined. 



The lines in the groups 12 and 14 are divided in the- 



f olio wing manner : — 



f A (4E) Trjpl. +1-64 - P63 



I B (6E) Doubl. +072 -072 



Group 12 { 



I C (4B) Sep. unknown. 



I E (10R) 



f A (5R) Tripl. +168 -T71 



I B (5E) Doubl. +065 -065 



Group 14 { 



I C (3) Sep. unknown. 



I E (10E) 



The separation is only known for the first two lines, which 

 became triplets or doublets, with probably identical values of 



- 2 . Both groups contain the line E instead of D. 



In group 8 all the lines are divided into triplets. The 



values of -^ are probably the same : — 



A," 



f A (6R) Tripl. +210 -212 



I B- 

 Group 81 



■ C (6E) „ +1-98 -200 



D(10E)„ +1-90 -1-89 



For the other groups there are not sufficient measurements 

 for comparison, although some other similarities could be 

 pointed out. 



Lund, Oct, 1914. 

 * After J. E. Purvis, Proc. of the Canibr. Phil. Soc, vol. xiii.(1906) p. 326 



