AND LIQUIDS AND THEIR VARIATION WITH TEMPERATURE. 



0015 

 14 



433 



0010 



000, 



O /0% 20 

 100% SO SO 



SO 40 M 60 70 

 70 60 SO 40 JO 



Percentage by volume. 



BO so 100 



10 



When the results given in these two tables are expressed by curves, with com- 

 position by weight as abscissas and conductivities as ordinates, the curves for 

 mixtures of methyl and ethyl alcohol and glycerine with water differ widely from 

 each other, and no general law connecting the conductivities of mixtures directly 

 with the conductivities and relative masses of the constituents can be traced. If, 

 however, proportions by volume are taken as abscissae, instead of proportions by 

 weight, the curves for mixtures of methyl and ethyl alcohol and acetic acid with 

 water become nearly identical, and we are led to the conclusion that in further 

 work proportion by volume should be made the basis of comparison. 



A further conclusion from an inspection of these curves is that the conductivity of 

 a mixture of two liquids is less than the value calculated by the linear formula 



, v l 



Vj + V, 



when l~i and L are the conductivities, i\ and v., the volumes, of the constituents 

 present, and that the difference is greater the greater the difference in the con- 

 ductivities of the constituents. 



VOL. CXCI. A. 3 K 





