338 ON THE SURFACE TENSION AND 



Sodium, the data are taken from my paper on the " Conductivity 

 of Solutions containing Potassium Sulphate and Sodium Chlo- 

 ride."* 



In calculating the ionization coefficients, the values of the 

 specific molecular con<fuctivity at infinite dilution which I used, 

 were those first given by Kohlrausch,f viz., 1280 x 10~ 8 , 

 1060 Xl0~ 8 , 1100 xl(T 8 , 1220xlO~ 8 , and 1030xl(r 8 ,m terms 

 of the conductivity of mercury at 0C, for Potassium, Sodium, 

 and Copper Sulphates, and Potassium, and Sodium Chlorides, 

 respectively. KohlrauschJ has since published what he considers 

 closer values for the sulphates, viz., 1270, 1070, 1120, for the 

 Potassium, Sodium, and Copper Sulphates respectively. Having 

 had my attention drawn to these later values. I have recalculated 

 a few of the ionization constants, and find that the difference 

 caused by using the later values is in all cases negligible. 



The following table contains the values of the ionization 

 coefficients used in the calculations. They apply to 18C. Con- 

 centrations of solutions are expressed in terms of equivalent 

 gramme -molecules of anhydrous salt, per litre, at 18C. 



* Trans. Roy. Soc., Can., 2nd Ser., Vol. 3. Sec. 3. 

 t Wied. Ann., Vol. XXVI, p. 204. 

 t Wied. Ann., 50 (1893), p. 406. 



