TO THEIR STATE OF IQNIZiTION MACGREGOR. 



221 



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-coefficients used in the calcula- 

 tions for simple solutions. They are as follows : 



These coefficients were obtained from Kohlrausch and 

 Grotria.n'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- 8 for KC1, and 1028 x 10~ 8 for NaCl, not being aware 

 at the time that Kohlrausch had given 1220 and 1030 respec- 

 tively as more exact values. Nevertheless, to save labor, I have 

 used the above values of a in the calculations of this paper, 

 having satisfied myself by a re-calculation in one case that 

 no appreciable difference 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. 



