58 ON THE CONDUCTIVITY, SPECIFIC GRAVITY AND 
TABLE IV. 
if aD 
SIMPLE SOLUTIONS. 
Sp. GR 
CONCENTRATION. SPECIFIC GRAVITY AT 18°. OF 
MEAN MIXTURE. 
Sp. GR. 
3 K,S0O,. KCl. 3 K,SO, KCl 
.5998 .9558 1.0410 1.0445 1.0428 1.0427 
.5998 09454 1.0410 1.0045 1.9228 1.0229 
. 1035 .05412 1.0073 | 1.0026 1.0049 1.0050 
Determination of Ionization Coefficients in the Mixtures. 
The method of determining the coefficients of ionization of 
the two electrolytes in a mixture has been fully described by 
*Prof. MacGregor. Curves are drawn showing the relation of 
the dilution to the concentration of ions for simple solutions of 
each salt. From these curves the concentration of ions and the 
dilution in the regions of the mixture occupied by the respective 
electrolytes are found by a graphical process, and the products 
of these quantities give the ionization coefficients. 
Results of Observations and Calculations of Conductivity of 
Mixtures. 
Table V gives the necessary data for the calculation of the 
conductivity of the mixtures examined, and the results obtained, 
The concentrations of the constituent solutions are expressed in 
terms of gramme-equivalents per litre at 18° C. The regional 
dilutions are in litres per gramme-equivalent at 18°C. The 
specitic conductivities are expressed as in Table I. The differ- 
ences between the calculated and observed values of the 
conductivity are given as percentages of the observed value. 
1Trans. N. S. Inst. Sci., 9, 101, 1895-6. 
