PROFESSOR 0. MASSON ON IONIC VELOCITIES. 
347 
respectively to the figures I'015 and I‘002 for y ' ^ ? plaCe of I‘017 and I‘014, 
found by the other method and given in the table. 
Table II.—Belative Velocities of the Ions. 
! 
Chlorides. 
Sulphates. 
Kohi.rausch. 
i 
■n = ‘5. 
n = 1. 
n = 2. 
H = -5. 
n = 1. 
n = 2. 
1879. 
1885. 
t 
1893. 
1 
1 K 
100 
100 
100 
100 
100 
100 
100 
100 
Na 
65-7 
6.5-4 
65-8 
66-9 
66-9 
65 
62 
68 
Li 
44-7 
4.5-2 
47-1 
44-4 
45-2 
44 
46 
55 
NH, 
100 
98 
96 
100 
JMg 
40-5 
36-9 
38-7 
1 
1 
Cl 
97-9 
96-1 
93-6 
102 
104 
105 
1 ISO, 
87-7 
87-7 
87-7 
... 
... 
In liable II., the results of the same experiments are given in such a form that the 
specific velocities of the different ions may be compared with one another and with 
u (K) 
those calculated for the same ions by Kohlrauscui. From the found values of 
i’(Cl) 
and 
Vj (Na) 
n (Na) 
the value of evidently he deduced, and so with the others. 
By making ^i(K) at each concentration equal to 100, comparable values are obtained. 
These are given for the chlorides and sulphates employed. Under Kohlrausch’s name 
are given, in parallel columns, the relative values of his specific velocities for the same 
ions, also reduced to the basis ii(K) = 100. The figures in the first of these columns 
correspond to the specific velocities calculated by him in 1879 (‘Ann. Phys. Chem.,’ 
vol. 6, p. 172) by extrapolation to extreme dilution from experiments with solutions 
the strength of which was not less than half normal. The figures in the second 
column correspond to the velocities given by him in 1885 (‘Ann. Phys. Chem.,’ 
vol. 26, p. 214) for solutions one-tenth normal, while the figures in the last column 
correspond to liis well-known specific velocities at infinite dilution, calculated in 1893 
(‘Ann. Phys. Chem.,’ vol. 50, p. 408) by extrapolation from his later work with 
exceedingly dilute solutions. 
The theoretical considerations advanced in the earlier part of this paper show that no 
exact agreement need be expected between the values for the same ion in the various 
columns of this Table. A general agreement might, hoAvever, be expected ; and it is 
2 Y 2 
