Saturation Currents in Ionization. 655 
In ease (1) I have taken g=100 per sec., and R=60 cms. 
per sec. for 1 electrostatic unit, these being probable 
values at 8 atmospheres for spontaneous ionization in air. 
CHa am Ti 
i ‘ 
i 
e=3'5x10- electrostatic units, and 7=1em. ‘The corre- 
sponding currents in amperes will be got by multiplying the 
values of f by 2x 107”. (Fig. 1.) 
2 LZ 2 
