234 ON A DIAGRAM OF FREEZING-POINT DEPRESSIONS, ETC. 
General Conclusions. 
Although the observations on which the above discussion is 
based are defective, and the particular conclusions drawn are 
consequently tentative, I think it may be held with some con- 
fidence (1) that the curves of equivalent depression against ioni- 
zation coefficient, have positions, forms, and slopes, such as they 
might be expected to have, on reasonable assumptions as to 
mode of ionization and constitution in solution, according to the 
Van ’t Hoff-Arrhenius theory of the depression of the freezing- 
point in solutions of electrolytes, (2) that for all the electrolytes 
examined, they are consistent with the depression constant 
having a common value of about 1.85, and that in the case of the 
electrolyte for which we have the best data, the curve is not 
consistent with a greater limit of error in this value than about 
.01, unless improbable assumptions are made with respect to the 
constitution of the electrolyte in solution, and (3) that the dia- 
gram enables us to reach in some cases, conclusions of considerable 
probability with respect to the constitution of the electrolyte in 
solution, and its mode of ionization. 
