Dielectric Constants of certain Frozen Electrolytes. 311 



there is a temperature for each electrolyte at which the dielectric 

 constant and the conductivity begin to increase with great rapidity, 

 the conductivity especially beginning with marked suddenness. 



Attention was next directed to the caustic alkalis, potash and 

 soda. Solutions of these bodies of various concentrations were 

 employed, and the results of the observations are shown in the 

 following table and set out in the form of curves in fig. 5. 



Dielectric Constant of Potassic Hydrate. 



(50 per cent, solution.) 



Frequency of contact maker 120. Galvanometer deflection with air 

 as dielectric = 2*60 cm. for 100 volts. 



Temperature Galvanometer 



in platinum deflection Dielectric 



degrees. in centimetres. constant. Observations. 



-203-2 8*23 156 



-149-8 12-00 22-9 



-135-6 14-57 27-8 



Solution of Potassic Hydrate. 



(20 per cent, solution.) 



Galvanometer deflection with air as dielectric = 3'91 cm. for 100 volts. 



-201-5 2 31 41-2 Charging volts 1*434 



-198-7 2-55 45 6 



-180-0 2-60 46-4 



-162-3 2-75 48-9 



In these observations 90,000 ohms were alternately placed in series 

 with, or removed from, the condenser circuit, without producing any 

 change in the galvanometer deflection, thus showing absence of any 

 sensible leakage current through the condenser. 



