﻿[ " 4 ] 



LXXXVIII. The Motion of Electrons in Carbon Dioxide. 

 By M. F. Skinker, Rhodes Scholar, Exeter College, Oxford *. 



IN some recent publications of the Philosophical Magazine, 

 Prof. J. S. Townsend and Mr. V. A. Bailey f describe 

 their experiments on the motion of electrons in l^drogen, 

 nitrogen, oxygen, and argon. 



In this paper I wish to give the results of similar experi- 

 ments with carbon dioxide and to compare the results. 



The apparatus used had the same dimensions and was 

 similar to the one described in the above papers. The 

 electrode E 2 , in fig. 1 J, however, w T as not exactly under 

 the slit in B, but was 0'6 millimetre to the right, In order 

 to find the velocity of agitation u it is necessary to find the 

 normal distribution-curve when the centre of the stream is 

 0*6 millimetre from the centre of the electrode E 2 . In this 

 case R, the ratio of the current received by the central 

 electrode to the total current, is given by the curve in fig. 2, 

 Z being the electric force in volts per centimetre. 



Fig. 2. 



o-7 

 0-6 



o-5 

 o-4 



o-3 



0-2 

 0-1 

































R 









^ 





























z 



R 





















p,\*5 







0.* 



QZ97 



0>f 



OilS 















4-0 



Q-fZ.1 







1* 



Q.500 





Q-fil 



\t 



0-601 















3 



0-6t1 







3* 



681 



to 



0-7M 

















Z 











0-5 



1-5 



2/> 



5-5 



The curve differs slightly from the curve which corre- 

 sponds to the case in which the centre of the stream 

 coincides with the centre of the electrode E 2 . 



* Communicated by Prof. J. S. Townsend, F.R.S. 



+ Phil. Mao-, vol. xlii. Dec. 1921, and vol. xliii. March 1922. 



t Fig. 1, vol. xlii. p. 875. 



