IN THE SOLID AND LIQUID PHASES. JOHNSTONE. 197 



VI Making C 2 = No. 2 condenser, 



No. 3 resistance was measured. 



VII MakingCo == No. 3 condenser, 



No. 3 condenser was measured. 



Table I gives-the values obtained for the different con- 

 jdensers and resistances. The above series of measurements 

 were made every few days and it was found that the capacities 

 remained remarkably constant, never showing variations 

 greater than 1%. 



To find if this method was reliable, the resistances were 

 measured by a direct current method, (see fig. 1), and a very 

 good agreement was found to exist in the two methods. These 

 measurements were made when the tubes had remained in a 

 thermostat for at least 15 minutes. The thremostat consisted 

 of an inner and outer vessel. The outer was constructed so 

 th^t cold water could be used to circulate about the inside 

 vessel. A heating coil was placed in the latter and using 

 electromagnetic regulation, temperatures ranging from 10 

 degrees above room temp., to 10 degrees below could be 

 maintained to the tenth part of a degree. 



TABLE No. 1. 



Bakers' acetic acid, (99.55% guaranteed), was used. To 

 eliminate water the acid was fractionally frozen and the 

 mother liquor was then poured off. The resistance of a 

 sample was measured after each separation and it was found 



