46 



CONDUCTIVITY AND VISCOSITY IN MIXED SOLVENTS. 



From the data given, especially in table 23, it is seen that cadmium iodide 

 does not show the minimum in mixtures of methyl alcohol and water at 25. 

 At 0, however, in a 75 per cent mixture, at volumes 16, 32, and 64, the mini- 

 mum appears. Beyond these concentrations it disappears. 



25$ 50$ 75$ 



Per cent Alcohol "by Volume 



FIG. 10. CONDUCTIVITY OF CADMIUM IODIDE IN WATER, 

 METHYL ALCOHOL, AND MIXTURES AT 25. 



In various mixtures of ethyl alcohol and water at 25 (table 23) no 

 minimum appears, although the values observed are in all cases less than 

 would be expected from the rule of averages. The results are plotted as 

 curves in figs. 9 and 10, the ordinates being conductivities and the abscissae 

 representing the per cent by volume of alcohol. 



