On Ionization by Spraying. 



383 



is broken vehemently into a very fine spray, and air and spray 

 pass together through about 50 cms. of tubing into the testing 

 vessel. An ordinary two-chambered electroscope was used, 

 as drawn to scale in figure 2. A rather heavy Dutch-metal 



Fij?. 2. 



A 



L2=J 



1=2$^ 



t— K CCC 



jo cm 



leaf was used (and observed by a microscope) when charged 

 between about 500 and 300 volts. 



To obtain a steady air-current ordinary foot-bellows, as 

 used for glass blowing, were employed. The air was 

 pumped into an iron boiler (0'1 cb. m.), and it passed thence 

 to the sprayer and to a manometer used for regulating the 

 current. 



Some preliminary tests proved the following : — 

 (1) When the sprayer contained air and no liquid, the 



2D2 



