140 



MK. J. S. TOWNSEND ON THE DIFFUSION OF IONS INTO CJASES. 



When hydrogen was passed through the tubing 10 centims. long it was found 

 that its conductivity was so much reduced that it could not be accurately determined. 

 It was therefore necessary to use another apparatus in which l t = 4 and /., = 1. 

 The curve showing the connection between x and y for the case where lijl t = 4 is 



given in the second diagram. 



Diagram 1. 



Curve I 

 between 



resenting 

 Ka.nd y 



the conne 

 when \ -i 



tan 







Diagram' 2. 



y 



e 



Curve 



kaCire 



representing 

 vi K a.nd 



the con, 

 'y when '/^ 



41 ffi, ' 



" 



H 



riecCion 



I! 



SECTION II. 

 DESCRIPTION OF APPARATUS. 



The apparatus which was used for experiments with air, is shown in fig. 1. It 

 consisted of a brass tube, A, 50 centims. long and 3 '2 centims. in diameter, with a 



