310 



Profs. J. A. 



Fleming and 



J. Dewar. On the 



6.0 



i 







J 





5.0 



iii 



V 



l 

 i 



/ft? 



: /I 



I * / 







CO* 



H 



< 4.0 A 



$* , 

 & i 





1 / /' i 



I A 



s / A 1 







CO 



z 

 o 



° 3.o" 





f 







o 





ETHYLBHE Ol^ 





^^•r 











y 2.0 





NITRO-BENZOL. 



ui 

 Q 



I.O 













TEMPERA 



TURE IN F 



i 



PLATINUM 



i 



DEGREES. 



-2GO° -150° -lOO -50° O 



Fig. 4. — Curves showing the variation of dielectric constant of various frozen 

 liquids with temperature. 



— 162° not more than 5*4 megohms. Hence there was an enormous 

 fall between -198° and -162°. 



Broadly speaking, it Avill be seen that in all the above cases, for 

 the electrolytes employed, the dielectric constant of the solution, 

 whether strong or weak:, when frozen and reduced in temperature to 

 — 200°, was represented by a number not very different from that of 

 the dielectric constant of pure ice at the same temperature ; and 

 hence it appears clear that the conductivity of the electrolytic solu- 

 tion at the ordinary temperature, when liquid, exercises very little 

 influence upon the dielectric constant of the electrolyte when frozen 

 and reduced to the temperature of liquid air. It is clear, also, that 



