The Electrical Conductivity 



49 









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lOK 





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FIG. 3. 



Curve "B" Fig. No. 3, is the time-current curve for crystal 

 No. 2. The current in this case being multiplied by a factor 

 10 to accentuate it on the scale. 



The electrical conductivity of the calcite was then measured 

 at different temperatures at a definite time after the potential 

 had been applied, so that the polarization effect was practically 

 eliminated. Table No. 2 shows the effect of temperature on 

 the conductivity and the curve in Fig. No. 4, shows that the 

 logarithm of the current is approximately proportional to the 

 absolute temperature. 



Table No. 2 



Temperature Current 



27.5°C. 8.05 K 



31.0°C. 10.5 K 



41.3°C. 15.3 K 



45.0°C. 24.0 K 



59.0°C. 65.0 K 



68.5°C. 125. K 



