WORK OF P. B. DAVIS. 



185 



Fluidity was calculated from the formula <j> = , where represents the fluidity. 

 The absolute viscosities of water 770 as given by Thorpe and Rodger are : 



25 0.00891 



35 0.00720 



45 0.00597 



55 0.005055 



65 0.004355 



75 0.003795 



TEMPERATURE COEFFICIENTS. 



The temperature coefficients in conductivity units represent simply the actual 

 increase in conductivity per degree rise in temperature. 



Per cent temperature coefficients, both of conductivity and fluidity, were calcu- 

 lated from the formula 



1 Gu p ,4>)35 -(m p ,</>)25 



Temp, coeff. of (/z, 4>) 



G4>)25 c 



10 



An attempt was made to obtain conductivity and viscosity data on the sulphate of 

 rubidium, but it was not possible to obtain a solution of higher concentration than 

 N/200. 



It was originally intended to carry on a parallel investigation with caesium salts, 

 but we have been unable thus far to secure sufficient quantities for the work. 



