418 



EEPOET — 1893. 



Cakhox — cntifinueff. 



Ctaxogen (Arc Spectrum). 



Kaysor and Runge, ' Ueber die Spectrcn der Elemente,' pt. ii. Berlin, 1889. 



* Eder and Valenta observed (Deiikschr. Kais. Akad. WissenscJi. Wien, Ix. 1893) in 

 the spark-spectrum between carbon-electrodes in air the ' edges ' 4210, 4197, 4181, 

 4167, 4157 of the second band; 38838, 3872-0, 3861-6, 3854-5 of the third band; 

 3590-1, 3585-6, 3584 of the fourth band ; and 3361-0. 



