306 



Prots. J. 



A. Fleming and J. Dewar. 



On the 



-200° -150 c -100 c 



TEMP. IN PLATINUM DEGREES. 



Fig. 3. — Curves showing the variation of dielectric constant of electrolytes with 



temperature. 



probable order of magnitude of the resistance of the condenser and 

 its mode of variation with temperature. 



Resistance in Megohms of the Condenser containing various Frozen 



Electrolytes. 



Sulphate of Copper. 



(10 per cent, solution.) 



Temperature 

 in platinum 



degrees. Resistance in megohms. 



-200 greater than 10,000'0 



-144 about 500-0 



-99 about 25-0 



-80 about 0-1 



