TEMPERATURE COEFFICIENT OF ICE. JOHNSTONE. 14] 



TABLE IV. 



Resistance of Ice 



Cell. Constant = .315 April 2, 1912 





Electe 



OSCOPE 



El.FCTRO- 



Temperature 



Ph 

 S 

 W 



(i 



Specific 

 Res. 



H 



I. 



II 



METER 



I. 



Th Cp 



II. 



Th. Cp 



Cal. 



Temp 



c3 



(Ohms.) 



4.10 



15-83 



61.1-83 



Im. 24 s. 



126 



125 



16.9 



19.30 



41.2 



0.05 



3 86x109 



4 30 



" 



' • 



Im. 25 s. 



127.8 



125.5 



17.0 



19.7 



»' 



" 



3.90x10'-' 



4.40 



" 



" 



Im. 28 s. 



128 



125.5 



16.9 



19.9 



" 



" 



4.04x10^ 



5.55 



" 



64.5-83 



Im. 30 s 



127 



122 



16.9 



19.6 



" 



" 



4.13x10** 



7 40 



14 5-80 



62.0-80 



Im. 17 s. 



121i 



" 



16.3 



18.6 



'< 



" 



3.56x10** 



8 00 



82-15 



62 5-82 



Im. 13 s. 



120.2 



118.8 



16.4 





t< 



'i 



3.47x10^ 



9.00 



15-81.5 



59.0-81 



Im. Os. 



117.0 



117.0 



16.4 



17.2 



" 



" 



2.69x10, 



10 00 



16-81 3 



58-81-5 



45 s 



112.6 



112.0 



" 



15 9 ; 



" 



" 



1.98x10 



10.04 



81 5-16 



" 



46 " 



111.1 



111.0 



" 



i 



'> 



i- 





10 15 



" 



" 



44 '' 



112.1 



111.6 



" 



15.8 ' 



" 



It 



1.94x109 



10.20 



81.3-16.5 



58-81.3 



45 '■ 



111.(1 





16.4 





«' 



11 





10.40 



" 



" 



40 " 



109.5 



110.0 



•' 





" 



I. 





11.00 



14.5-81 



55.5-81 



22 '' 



95 . 



93 



" 



10.8 



'• 



" 





" 



" 



" 



89 '• 



'• 



" 



" 



" i 



" 



0.2 



947x109 



11.10 



" 



" 



90 " 



94.5 



" 



" 



10 6 ' 



" 



" 



0.958x10*' 



11.17 



15 81.5 



55-81.5 



88 " 



93.0 



91.5 



16.3 



10.3 1 



" 



" 



0.936x109 



11.40 



IC 





88 " 



90 





" 



9.4 



" 



" 



0.852x10® 



12.00 



16-81.5 



53.8-81.5 



414" 



75 



73.5 



16.8 



4.5 ' 



" 



i- 



0.457x10** 



12.15 



" 



" 



39 " 



72.5 



72,0 



16.75 



3 . 85 



" 



" 



0.430x109 



12.25 



15-81.5 



54.2-81.5 



381" 



71.5 



70.0 



16.8 



3.5 



" 



" 



0.410x109 



A, 3. 























10.15 



23-80 5 



67 80.5 



48 '■ 



77.3 



76.0 



14.8 



7.1 



" 



" 



0.464x109 



10 25 



" 



" 



" " 



77.1 



76.0 



•' 





" 



" 





11.10 



20-82.5 



64-82 5 



79 " 



62.1 



61.0 



15.2 



2.3 



" 



1.00 



0.169x109 



11.15 



" 



66-82.5 



85 " 



63.0 



61.3 



15.2 



2.6 



" 



" 



0.181x109 



11.33 





" 



36 " 



77.5 



77.0 



15.3 



6.8 



" 



0.20 



0.390x109 



11.37 





(( 



39 " 



81.0 



79.1 



" 



7.8 



" 



" 



0.423x109 



11.47 



21.6-82.6 



62-82.6 



21 " 



56.8 



55.6 



1.T.4 



0.6 



" 



l.QQ 



CSSbxlO® 



11.55 



" 



" 



19.1'- 



55.0 





'• 



0.1 



" 



" 



0.0349x10^ 



12.00 



'• 



" 



19 " 



" 





" 





" 



" 





12.10 



20.0-82.4 



58-82.4 



21 " 



55.1 



57.0 



" 



QO 







0.0367x109 



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

 the conductivity of the contents to auite 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 giame in every experiment performed. 



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

 specific resistance of about 1.4 x 10'' 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 tempeTature-gradicnt.in the "U" 



Proc. & Trans. N.S. Inst. Scr., Vol. XIII. Trans.— 10. 



