34 CONDUCTIVITY AND VISCOSITY IN MIXED SOLVENTS. 



TABLE 15. Comparison of the molecular conductivity of strontium iodide. Continued. 



Some of the results in table 15 are plotted as fig. 5. It is seen that in 

 this curve the effect of temperature has been such as almost to blot out the 

 minimum value in the curve for v = 32 ; and in the other dilutions the 

 minimum is much less pronounced than in the curves thus far studied. 

 The effect of temperature is also to shift the minimum point to the right, 

 the minimum point existing for an alcohol of about 65 to 70 per cent. 



In table 15 for we see that the values for pure ethyl alcohol are, in the 

 stronger solutions, much smaller than those for the mixture. They, however, 

 increase more rapidly, and in the most dilute solutions pass the values for 

 the mixture, giving us again the minimum point. At 25 there is not the 

 slightest trace of a minimum point, although the values are well below the 

 mean of the values for the pure solvents. 



In comparing the values for a mixture of propyl alcohol and water with 

 those for the pure solvents, we find that there is not the slightest trace of 

 a minimum either at or 25. 



CADMIUM IODIDE. 



The cadmium iodide which was used was a sample which had been em- 

 ployed in some previous work in this laboratory, and had then been very 

 carefully purified. The solutions were made by direct weighing. 



TABLE 16. Comparison of the molecular conductivity of cadmium iodide. 



