TO THEIR STATE OF IONIZATION—MACGREGOR,. 271 
of that paper, gave with considerable accuracy the ionization- 
coefficients of the simple solutions of these salts in terms of 
their molecular concentration. To save space I may tabulate 
here the values of the ionization-coeticients used in the caleula- 
tions for simple solutions. They are as follows :— 
SODIUM CHLORIDE. POTASSIUM CHLORIDE. 
G Tonization- G 1 Ionization- 
rm.-mols. coefficient at elas ONE coeflicient at 
per litre. 18° C. per litre. 18° Cc. 
25 "792 1875 "8267 
95) "736 3402 S11 
*8928 “6866 375 ‘796 
1:0 ‘676 a ‘785 
115) 633 “6856 "769 
1'8353 ‘601 ‘7d ‘768 
2:0 5866 1:0 “756 
2°5 *Da04 1:0467 "75D 
2°8373 "5255 1:4292 exit | 
3°0 514 15 ol: 
3°9375 "4516 2:0 712, 
2°185 “7048 
2°5 "695 
2°986 ‘681 
3°0 ‘680 
These coefficients were obtained from Kohlrausch and 
Grotrian’s and Kohlrausch’s observations of conductivity at 
18° C.* In obtaining them I took the specific molecular con- 
ductivity (referred to mercury) at infinite dilution to be 
1216 x 10-* for KCl, and 1028 x 10—* for NaCl, not being aware 
at the time that Kohlrausch had given 1220 and 1030 respee- 
tively as more exact values. Nevertheless, to save labor, I have 
used the above values of «in the calculations of this paper, 
having satisfied myself by a re-calculation in one case that 
no appreciable ditference in the results would be produced 
by the employment of more exact values. It will be noticed 
that in one or two cases the above values of @ are obviously a 
little out ; but they would seem to be sufficiently accurate for 
my purpose. I did not foresee the extent of the calculations, 
* Wied. Ann. vi. (1879) p. 37, and xxvi. (1885) p. 195. 
