fiarss — Ionization by Collision in Gases and Vapors. 235 



160 320 480 

 Fig. 2. Air. 



80 100 120->X-r-P 

 Fig. 3. Hydrogen. 



400 800 



800 1200 



Fig. 4. Sulphur dioxide. 



400 



800 



200 400 600 

 Fig. 5. Alcohol. 



200 400 600 



-> Volts per centimeter. 



