86 



CONDUCTIVITY AND VISCOSITY OF SOLUTIONS 



TABLE 25. Viscosity and fluidity of potassium iodide in alcohol-water mixtures. 



Viscosities at any temperatures were calculated from the formula 



where 17 is the viscosity coefficient desired; T; O the absolute viscosity of 

 water at the desired temperatures; s the specific gravity of water at 

 that temperature, and t the time of flow of water in any given vis- 

 cometer. s and t are, respectively, the density of the solution and its 

 time of flow in the same viscosimeter. 



The fluidity is the reciprocal of the viscosity, = - 



The percentage temperature coefficients of fluidity are derived in the 

 same manner as those of conductivity. 



