356 



Mr Townsend, Electrical Properties of [Nov. 22, 



charged gas; this caused the spot of light on the electrometer 

 scale to move n divisions, which is proportional to p the density of 

 the electrification after the gas has remained in the cylinder for a 

 time t. 



The numbers thus obtained for n and t are given in Tables I. 

 and II., the first being for charged hydrogen and the second for 

 charged oxygen. 



Table I. 



Table II. 



It will be seen that these numbers are nearly exactly the same 



as those given by the formula n = ^ w., if we put w =32 and 



# = •0043 in the case of the hydrogen, and ^ = 49 and #= -00255 

 in the case of oxygen. The numbers calculated from this formula 

 are given in the two following tables : 



Table III. 



Table IV. 



