TRANSACTIONS 



OF THE 



,^>cotian Institute of 



SESSION OF 1912-1913. 



ON THE ELECTRICAL RESISTANCE OP ACETIC ACID IN THE 

 SOLID AND LIQUID PHASES. BY J. H. L. JOHNSTONE, 

 B. Sc., Dalhousie University, Halifax, N. S.* 



Read, March 9, 1914. 



In a previous paper 1 the writer published some results on 

 the electrical resistance of ice, showing how it varied with the 

 temperature. Its temperature-coefficient was found to be 

 unexpectedly large and a further investigation of this point 

 was thought desirable. 



As it had been difficult to obtain. satisfactory regulation 

 of temperature below C, it was decided to choose for the 

 present investigation some substance with a melting-point so 

 high, that with the substance in the solid state, the temper- 

 ature could be regulated in a thermostat. Acetic acid appeared 

 to fulfil these conditions; and it can be easily obtained in a 

 comparatively pure state. 



The method of measurement used in the previous inves.- 

 tigation was inconvenient. It was also felt to be unsatisfac- 

 tory as it was a direct current method and so introduced the 

 danger of polarization effects. It seemed desirable there- 

 fore to obtain some alternating current method. 



* Contributions from the Science Laboratories of Dalhousie University f Physics'. 

 1 Trans. N. S. I. S. Vol., XIII, 2, pp. 126-144. 



PROC. & TRANS. N. S. INST. Set., VOL. XIII. TRANS. 13. 



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