on the spark spectra of palladium, rhodium and ruthenium. 331 



X 



dx/x 2 



In- 

 tensity 





4473-4 







/The constituents are too weak to measure; 

 1 the outer edges of the constituents appear- 

 to be more diffuse and weaker than the 

 ( inside edges. 



3832-6 



+ 1-31 





 -1-31 



3 

 3 



The 2 constituents appear to be equally strong 

 f on both sides. 



3690-3 



+ 1-04 





 -1-04 



2 

 2 



1 The 2 constituents are very strong and diffuse. 

 | Compare the quadruplet of 3460-4 (p. 326). 



3382-6 





2 



Too weak to measure. 





+ 0-72 





3301-9 













-0-72 

 + 0-65 



2 

 3 



The constituents of both these lines are strong 

 1 and diffuse. 



3251-4 













- 0-65 



3 





3059-4 















1 Too weak to measure. 



3032-2 









3002-6 



+ 1-24 





 -1-24 



4 

 4 



1 The outside edges of the constituents appear 

 to be more diffuse than the inside edges. 



2980-7 





3 

 3 



Too weak to measure. 



2372-2 



+ 1 -05 





 -1-05 



) Compare with 3690-3 and the quadruplet from 

 Y 3160-4 (p. 326). 



The lines 3571-1, 2424-5, 2357-7, are neither divided nor 

 widened. 



There are many other lines which are widened or divided, but 

 they are too weak for analysis. Only those lines are described 

 which distinctly affect the photographic plate during an exposure 

 of 30 minutes. 



