TEMPERATURE COEFFICIENT OF ICE. JOHNSTONE. 14] 



TABLE IV. 

 RESISTANCE OF ICE 



CELL. CONSTANT = .315 April 2, 1912 



It was found that the rubber tubing in the "U" tube affected 

 the conductivity of the contents to quite an extent, and in this 

 particular experiment the water was frozen without the pre- 

 sence of the rubber, and also in the suceeding experiments. 

 However, the general shape of the temperature resistance curve 

 was found to be the s>ame in every experiment performed. 



The water, which was put in the cell originally, had a 

 specific resistance of about 1.4x 10 rt ohms at 17.9 C. 



In the measurement of the temperature of the ice between 

 the "potential" terminals, by the thermo-couple, it .was found 

 that there was a considerable temperature-gradient' in the - ( U" 



PROG. & TRANS. N. S. INST. Sci., VOL. XIII. 



TRANS. 10. 



