MIXTURES OF ELECTROLYTES—MACGREGOR. 111 
molecular conductivity of the simple solutions at infinite 
dilution. Owing to the want of this datum, I have drawn the 
curves */V = ¢(V) by means of data based on Kohlrausch and 
Grotrian’s and Kohlrausch’s *observations of the conductivity of 
solutions of these salts. They are as follows :— 
NaCl SOLUTIONS. 
“oncentration Ss Dilution : P 
Gramme-molecules | Specific molecular Litres per Concentration 
per litre. conductivity. Gramme-molecule. of lons. 
0.5 757 2 0.3682 
0.884 710.42 1.1312 0.6109 
1 695 i 0.6761 
1.830 618.59 0.5465 1.1012 
2.843 539.93 0.3517 1.4932 
3 528 0.3333 1.5418 
3.924 466.35 0.2548 1.7802 
5 398 0.2 1.936 
5.085 392.53 0.1967 1.9416 
5.320 377.65 0.1878 1.9562 
eae ill 371.95 0.1845 1.9611 
KCl SOLUTIONS. 
Cea aon Specific molecular Tatoo eee Concentration 
per litre. conductivity. Gramme-molecule. of Ions. 
(0505) 958 2 0.3939 
0.691 933 .43 1.4472 0.5304 
1 919 1 0.7558 
1.427 890.70 0.7008 1.0452 
2.208 855.52 0.4529 1.55385 
3 827 0.3333 2.0409 
3.0389 823.95 0.3291 2.0592 
3.213 817.94 0.3112 2.1612 
It will be seen that the above data are quite sufhcient for 
drawing the curves representing ¢/V as ¢(V) in the parts 
corresponding to small dilutions; but that the data are few for 
the parts corresponding to the greater dilutions, where the 
curvature is more rapid. In order to draw these parts of the 
curves therefore, I obtained interpolation formule, expressing a/V 
*Wiedemann’s Annalen, VI, p. 37 (1879) and xxvi, p. 195, (1885). 
