FLUIDITY. 



105 



Tables 61 to 63 (figs. 40 and 41) show that there is a minimum of fluidity 

 only in the case of acetone and water. In the mixtures of acetone with 

 methyl alcohol we get somewhat larger values than would be expected from 

 the fluidities of the pure solvents. This effect is not so apparent, however, 

 in the case of acetone and ethyl alcohol. These last values were compared 

 with those derived from Dunstan's results, and were found to be almost iden- 

 tical with them. 



100"5 



Percentage of Acetone 

 FIG. 40. FLUIDITY OF SOLVENT MIXTURES AT 0. 



If we compare the viscosity curves of acetone and water, with the fluidity 

 curves, we find that the maximum is more pronounced than the fluidity 

 minimum. The viscosity curves for mixtures of acetone and the alcohols 

 show a marked sagging, as Dunstan has pointed out. 



Table 64 shows that although the temperature coefficients of conductivity 

 and fluidity vary in the same manner, the former are uniformly smaller than 

 the latter. 



