376 A. W. Ewell — Air in an Intense Electric Field. 



The curves for the power absorbed show that the power 

 absorbed does not increase proportionally with increasing dis- 

 tance or current and is independent of the thickness of the 

 glass. 



5 



Fig. 5. Power factor and power absorbed in a Siemens ozonizer. Ab- 

 scissae = ionization current in milliamperes. Ordinates : left = power factor ; 

 right = watts. Effective area of discharge = 404 cm ' 2 . Temp. = (approx.) 20°. 

 I, II, III and IV give the power factors for -59 cm of plate glass + -20 cm , 43 cm , 

 131 cm , and 2-41 cin of air, respectively ; A and B for -24 cm of window glass + 

 •30 cm and l-66 cm of air, respectively. I', II', III', IV, A', and B' are the 

 corresponding curves for the power absorbed. 



