144 
MR. W. R. BOUSFIELD : IONIC SIZE IN RELATION TO 
Table XXYL— Nad. 
N. 
7r-*» 
v Na 3 x 10°. 
0-301 
0-2528 
0-2011 
0-1505 
0-03087 
0-02748 
0-02359 
0-01945 
10-339 
10-516 
10-723 
10-952 
0-1004 
0-01485 
11-210 
0-07581 
0-05035 
0-03798 
0-01231 
0-00937 
0-00765 
11-358 
11-531 
11-634 
0-02520 
0-00591 
11-739 
a 
— 
• C1 s x 10°. L-. 
A/N. 
a. 
2-623 12-96 
3-40 
0-737 
2-709 13-23 
3-41 
0-751 
2-813 13-54 
3-43 
0-769 
2-929 13-88 
3-44 
0-790 
3-065 14-28 
f 3-46 "1 
1 3-48 I 
0-819 
3-144 14-50 
3-49 
0-837 
3-239 14-77 
3-50 
0-863 
3-297 14-93 
3 • 55 
0-878 
3-356 15-10 
J3-52-I 
1 3•57 J 
0-896 
15-68 
— 
D 
observed. 
D 
calculated. 
Difference. 
1-96 
1-96 
+ 
1-95 
1-95 
+ 
1-94 
1-94 
+ 
1-92 
1-93 
- 1 
/ 1•901 
1 1-91 I 
1-91 | 
- 1 
+ 
1-90 
1-90 
+ 
1-88 
1-89 
-1 • 
1-89 
1-89 
+ 
f 1-861 
11-88 j 
1-88 | 
__ 9 
+ 
In the last columns are given the calculated values of D and the differences from 
the observed values. 
In diagrams VIII. and IX. are set out the values of the effective molecular 
depression as ordinates, upon the values ol (I a — I„) as abscissae. I a stands for the 
value of the ionic volume at infinite dilution (see Tables XIII. and XIV.). The values 
of I are 
for KC1.I a = 7-261, 
for NaCl.I a = 15-68. 
It will be seen at a glance that we have a linear relation between the E.M.D. and 
the ionic volume, and that the limiting value oj the L/.2I.D. at infinite dilution is 1 86. 
the same value as lias been determined for non-electrolytes such as sugar. 
