20 



THE THEORY OF IONIZATION OF GASES 



zp respectively. Hence the three variables must be 



/"V \ 



connected by an equation of the form -==/7 j. The 



experiments confirm this result very accurately for all 

 the gases, and so afford an important verification of the 

 theory. 



40 



ICC 



(X in volts per centimetre, p in millimetres of mercury.) 

 Figure 7. 



The curves representing the values of a/p corre- 

 sponding to some of the larger values of X/p are given in 

 Figs. 6 and 7. 



The values of a/p for the smaller values of X/p are 

 given in Fig. 8 for some of the gases. 



