144 ELECTRICAL RESISTANCE, ETC. OF ICE. JOHNSTOXE. 



SUMMARY. 



1. The specific resistance of ice has been determined at 

 temperatures ranging from to -- 19 C. 



2. The effects of electrolytic-polarization have bee'i 

 eliminated by the method used. 



3. The value of the temperature-co-efficient of the resist- 

 ance of ice has been determined at different temperatures and 

 its value has been found to be very much higher than the tem- 

 perature-co-efficient of ordinary electrolytes. It decreases in 

 value as the temperature decreases from zero. 



The values obtained for the specific resistance of ice com- 

 pare fairly well with those obtained by Ayrton and Perry, 

 using a different method. 



In conclusion I wish to thank Dr. H. L. Bronson, who 

 suggested this work, and without whose kind supervision and 

 assistance, this research could not have beer undertaken. 



Dalhoueie University, Halifax, N. S. 

 April 20th, 1912. 



