THE ELECTRICAL RESLSTAXCE, ETC. OF ICE. .JOHNSTONE. 127 



Ice was frozen from distilled water in a copper vessel, like 

 that shown in Fig. 1. Connections were then made as shown 

 in Fig. 2, the current passing through the ice being measured 

 bv a galvanometer. Knowing the E. :\.''. F. of the cells in the 



TABLE I. 



Ayrton and Perry's 

 Value.s 

 For THE Ke.sistivity of Ice and HoO. 



Temperature 'C . 



Resistivity. 



-12.4 



22AxW 



-6.2 



10.23x10' 



-5.02 



9.486 xlO« 



-3.5 



6.42 xlO' 



-3.0 



5.693x10' 



-2.46 



4.844x10'' 



- 1 . 50 



3.876x10' 



-0.2 



2.8i xlO* 



+ 0.75 



1.188 X 10' 



+ 2.2 



2.48 X 10" 



+ 4.0 



9.10 xlO*^ 



+ 7.75 



5.4 X 10' 



+ 11.02 



3.4 xlO' 



Resistance in ohms. ("BA"). 



