Duane — Emission of Electricity. T 



that of s„ and vice versa. As the secondary rays depend on 

 the primary, and as there are tertiary rays depending on 

 the secondary, etc., this assumption is probably not strictly 

 correct. 



Of course s\ and s, may be further analyzed into their con- 

 stituents a and /3 rays, secondary and tertiary, etc. 



13. We now come to the important question, do the de#ay 

 curves that can be drawn with the data in Tables I and II coin- 

 cide with curves drawn from ordinary ionization data % It will 



5.0 



4,5 



4,0 



3,5 



3,0 



3 2,5 



2,0 



1,5 



1,0 



0,5 





















2 

















3N\ 















1 









































©"O 









































































10 20 30 40 50 



Time in minutes. 



70 



80 



be seen that they do not. For comparison I measured the cur- 

 rents due to the ionization in air produced by the a rays, when 

 the electrode was made active in exactly the same way as 

 before. The electrode, after being withdrawn from the ema- 

 nation, was placed opposite a hole in a large condenser, and 

 the decay of the ionization current due to the a rays measured. 

 Table III, column 2 contains the values of the currents meas- 



