1046 



that in tlie method used we have a very good means to discern 

 between lines or bands belonging to different "carriers", 



C. Argon. 



The spectral properties of this gas are widely different from those 

 of the preceding elements. It i^ a well known fact that Argon 

 gives a red and a blue spectrum. The representatives of the red 

 and the blue spectrum show a totally different behaviour with 

 respect to the supplied energy as is evident from the graphical 

 representation in fig. 3 ^) of the connexion between the intensities 

 of the light and of the current for the red and the blue spectrum 

 of argon. 



Intensity 



Fig. 3. 



Also by changing other variables we find back this difference in 

 behaviour. 



§ 3. Measurements luith binary mixtures. 



The observations on gaseous mixtures show a pronounced difference 

 between those mixtures, between the components of which reactions 

 can take place and those for which this is not the case. 



1) This figure is a good confirmation of the visual observations of P. G. Nutting 

 and 0. TuGMAN (Bull. Bur. of Stand 7, 62 (1911). 



