HYDRATES AND TEMPERATURE COEFFICIENTS OF CONDUCTIVITY. 157 



3. The temperature coefficients of conductivity for any given substance 

 increase with the dilution of the solution, and this increase is greatest for 

 those substances with large hydrating power. 



All three of these conclusions are necessary consequences of the assump- 

 tion that the large increase in conductivity with rise in temperature is due, 

 in part, to the decreasing complexity of the hydrates formed around the ions. 



Since these conclusions are all verified by the results of experiment, we 

 must accept the assumption that led to them as containing a large element 

 of truth. 



It is more than probable that the decreasing complexity of the hydrates 

 with rise in temperature, is a very important factor in conditioning the large 

 temperature coefficients of conductivity, shown especially by those substances 

 that have large hydrating power. 



