EXPERIMENTS WITH IONIZED AIR. 



4Y 



reproduced by a simple geometric progression. Tliis miglit plausibly be ascribed to 

 the waning activity of the phosphorus itself, for o' is necessarily a quantity decreas- 

 ing in the lapse of time with the number of particles per cub. cm. supplied. 

 Compatibly with the direct experiments just discussed, however, the cause is 

 probably incidental. 



•200 



■450 



■050 



45 go 80 lOOmin TIO 140 160 160 ZOOmin 



l^ig 



_.c 



U 



Temp 



X' 



0" 



Temp 



20° 



Fig 3 -Chart Showing the Ageing of the Ionizer. Fig. 4.-Chart Showing the 

 EFFECT OF Temperature on the Activity of the Ionizer. Fig. 5.-Fall ok Potential in the 

 Lapse of Time for Different Distances of the Condensk.r Plates, Fig. G.-Computed Curve 

 AND Observed Values of c'= - (dV/dt)/V.loge, for Different Distances apart, x, of the 

 Condenser Plates. 



