Stiles and Jergensen.—Studies in Permeability. I. 357 
rate than in the pure solution of the salt, its concentration being the same 
in the two solutions. 
In order to test this possibility various mixtures of lithium chloride 
with potassium chloride were used. In each case the lithium chloride was 
.'S 
o 
<3 
Fig A Potato in solutions of Lithium Chloride of various strengths. 
N 
present in the solution in a concentration of -. Potassium chloride 
r 2000 
was added to the different solutions so that the following ratios of Li : K 
were obtained: 
1 : 0.4 
t : 1 
1 : 2 
1 : 4 
1 : 7. 
The curves in Fig. 5 show very clearly how increasing the quantity of 
potassium chloride decreases the exosmosis produced by the lithium salt, 
and this is the more striking as a certain amount of exosmosis does result 
when potassium chloride is present alone in the solution (cf. Fig. 1). The 
result can scarcely be due to a depression of the ionization of lithium 
chloride as a result of addition of potassium chloride. The strongest 
solution contains a total number of molecules corresponding to no stronger 
N 
a solution than one of —and in this dilution nearly the whole of the 
125 
dissolved substance will be ionized. Also the slowing of the rate of increase 
