4S6 
Messrs. Smith and Moss on the Contact 
necessary for the purpose of reaching the origin. Electro- 
capillary curves were obtained with solutions containing 
gradually increasing proportions of Na 2 S. The general 
composition of the solutions was 
.6'(^KCl)+2/(nNa 2 S, 9H 2 0), 
where x+y = 0'l\ i. e., considering the sum of the contents, 
the solution was always l/10th normal, and the content in 
kations remained approximately constant. Curves were 
obtained for a number of different values of y. Some of the 
results are shown in fig. 2, in which the values of y repre- 
sented are as follows : — 
No. of Solution ... 
I. II. III. IV. V. VI. VII. VIII. IX. X. XIII. XV. 
Value of y 
-0 3 2 3 372 -0,374 3 377 "0 2 l -0 2 2 -0 2 5 -01 03 -08 -10 
•d 
io 
V 
Cx 
10 
<•* 
^ 
^ 
% 
k 
N 
\\ 
■3 
% 
%\ 
v \ \\ 
\ 
\ 
Co " 
St 
^ 
|\ 
\ v. 
to 
A(i, 
i 
8. 
s. /0OO z 
= 0>/$8 Voi 
& ■ \ \ \ 
7^ 
IC.OOt 
J-L 
From these results it will be seen that less than -001n Na 2 S 
added to '099?iKCl was sufficient to move the maximum of 
