on the spark spectra of palladium, rhodium and ruthenium. 351 



X 



d\/X 2 



In- 

 tensity 





2507-1 







, 



2493-8 







r Too weak and diffuse to measure. 



2481-3 







J 





+ 1-76 



5 





2455-7 







3 







-1-76 



5 







+ 1-80 



3 



\ 



2403-0 





 - 1-80 



2 

 3 



I The middle constituent removed by calcite. 



2358-2 















The following lines become doublets, but they have not the 

 same appearance. The constituents of several of them seem to 

 be equally sharp on both sides ; whilst the inside edges of others 

 are sharper and stronger than the outside edges. Probably there 

 are other overlapping constituents, but they are too weak for 

 analysis, as in the case of palladium and rhodium. The measure- 

 ments were taken between the centres of these aggregates. 



4584-7 

 4460-4 

 4372-7 



4217-6 



4206-5 



3926-1 



+ 1-09 



2 









-1-09 



o 



+ 1-00 



2 









- 1-00 



2 



+ 1-41 



3 









-1-41 



3 



+ 1-37 



2 









-1-37 



2 



+ 0-79 



3 









-0-79 



1 



3 



^Compare X 4372-7. 



Too weak and diffuse to measure. 



The outside edge of each constituent is more 

 diffuse and weaker than the inside edge. It 

 is too weak to analyse. 



do. 



do. 



The constituents seem to be equally sharp in 

 both edges. 



