14 



two cylinders of 2*8 and 16 cms. diameter respectively, a 

 potential difference of 32 volts between the cylinders being 

 found sufficient to completely remove all the ions from the 

 gas. The distance of the gauze from the central electrode and 

 the size of gauze used are not definitely stated. It will be 



To Earfh <- 



X'O 



SK To Ekdromcter 

 Sulphur 



■Insulshon 



a- 



To \Pumi 



-1^ To Cdh 



Q^ti^e. 



Uranium^ 



Fig, 1. 



shown in the present paper that the form of the saturation 

 curve obtained in such an apparatus depe^ds largely upon 

 these two latter factors, as well as upon the potential differ- 

 ence between the cylinders, and also their size. 



In attacking the question of the ionization in gases after 

 their removal from the action of the ionizing agent, two direct 



