IN THE SOLID AND LIQUID PHASES. — JOHNSTONE. 197 



VI Making C2 =^ 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- 

 densers 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 

 that 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. 



Ci 



Vs 





Ri 



3000 

 26440 



4225 

 16970 



3170 

 36220 



5930 



c= 



R,2 



.05 M.F. 



20494 



.0487 M.F. 



R No. 1 



C. No. 1 



No. 1 



No. 1 



No. 2 



No. 2 



No. 2 



No. 2 



No. 3 



No. 3 



No. 3 



Quantity Measured. 



.05 M. F. = .0487 M. F. 

 Res. No. 1 = 1.81 X 10° ohms 

 Cond. No. 1 = .00783 M. F. 

 Res. No. 2 = 7.22 X 10' 

 Cond. No. 2 = .00146 

 Res. No. 3 @ 9° C. =8.27X10' 

 Cond. No. 3 = .000238 



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

 eliminate water the acid was fractionally frozen and the 

 mother Hquor was then poured off. The resistance of a 

 sample was measured after each separation and it was found 



