DIELECTRIC PROPERTIES OF INSULATING MATERIALS 521 



6.2 6.0 5.8 5.6 5.4 5.2 5.0 4.8 4.6 4.4 4.2 

 RECIPROCAL OF ABSOLUTE TEMPERATURE , -p-j^ 



3.8 3.6 

 X I0"3 



Fig. 5 — An illustration of polarization conductivity. The temperature-depend- 

 ence of the polarization conductivity of pure ice in the range — 0.8° C to — 190° C. 

 The free-ion (or d-c) conductivity is also shown for a single temperature. . 



Types of Infinite-Frequency Conductivity 



In Table I of the preceding paper there were Hsted several types of 

 polarization capable of yielding anomalous dispersion curves dis- 

 tinguishable from each other only by the values of the constants. 

 Corresponding to each is a different expression for the polarization 

 conductivity and these expressions are listed in Table I of this paper. 



