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BELL SYSTEM TECHNICAL JOURNAL 



oscillating in the ionized gas. But, the results of the experiments 

 were not agreeable. True, in one important respect there was con- 

 cordance with theory. Szekely measured the resistance of the 

 ionization-condenser (or, to express it better, the resistance of the 

 ionized air between the plates) for various values of the direct current 

 sustaining the ionization, and various frequencies ranging from one 



4 8 12 16 



n^xiO-l'^ (SEC0NDS"2) 



Fig. 3 — High-frequency resistance of ionized rarefied air, plotted against square 

 of frequency. (A. Szekely; Annalen der Physik.) 



to five millions. Plotting against the square of the frequency those 

 values of resistance which belonged to one and the same strength of 

 direct current, she obtained ascending straight lines (Fig. 3). Now, 

 this agrees with the equation (7) supplied by the theory, according 

 to which the reciprocal of the conductivity of an ionized gas is a 

 linear ascending function of frequency squared, if N be constant; 



