VISCOSITY AND CONDUCTIVITY. 



71 



TABLE 44. in methyl and ethyl alcohols. 



1 The volumes of comparison are the same as those in the case of lithium nitrate. 



The conductivities compared were, for the volumes 128, 256, 512 for methyl 

 alcohol, 190.7, 381.4, 762.8 for ethyl alcohol, these being comparable dilu- 

 tions. In the case of solutions in ethyl alcohol values for the conductivities 

 were found by interpolation. 



As is seen from inspection of table 44, the constants for the comparable 

 volumes are equal to within a few per cent. Further, the constant is the 

 same at the lower and at the higher temperature. Of course the constants 

 are not the same for the different volumes, for here we have used the associa- 

 tion factor as a constant in the equation ; it represents dissociation. If we 

 were to substitute per cent of dissociation for the association factor, the values 

 for the constant would be the same in all cases. 



All together, the agreement of theory and fact is all that could be expected, 

 when we consider the errors involved in the determination of the quantities 

 used. The figures for association are certainly only approximate. Conduc- 

 tivities are liable to an appreciable error, and different observers give values for 

 the viscosity coefficients differing by as much as 4 or 5 per cent. 



Values for the conductivities in ethyl alcohol are taken from the work of 

 Jones and Lindsay; those given by them for methyl alcohol solutions are not 

 used. Those of Carrara are taken, as they agree with values given by Zelinsky 

 and Krapiwin, while those of Jones and Lindsay do not. 



In all the cases the agreement is as close as could be expected. 



The volumes compared were 64, 128, 256, and 512 for methyl alcohol; 

 for ethyl alcohol, 95.7, etc. The values found by both Jones and Lindsay and 



