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- 
tide: * 
In calculating the ionization coefficients, the values of the 
specific molecular conductivity at infinite dilution which I used, 
were those first given by Kohlrausch,t viz, 1280x1078, 
1060 x 10°, 1100 x 10°, 1220 x10-*, and 103010, in terms 
of the conductivity of mercury at O0°C, for Potassium, Sodium, 
and Copper Sulphates, and Potassium, and Sodium Chlorides, 
respectively. Kohlrausch? 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 18°C. Con- 
centrations of solutions are expressed in terms of equivalent 
gramme-molecules of anhydrous salt, per litre, at 18°C. 
* Trans. Roy. Soc., Can., 2nd Ser., Vol. 3. Sec. 3. 
t Wied. Ann., Vol. X XVI, p. 204. 
t Wied. Ann., 50 (1893), p. 406. 
