418 
Substance 
Equi- 
valent 
' v oo 
Known ionic 
velocities 
Required ionic 
velocities by dif- 
ference from ,« 0 0 
Remarks 
1 
(NH 4 ) 2 S0 4 
81.8 
NH 4 - =39.2 
i/ 2 S0 4 " =42.6 
Na 2 S0 4 
68.2 
'/s S0 4 " = 42.6 
Na' =25.6 
KnS0 4 
84.4 
»/gS0 4 " = 42.6 
K- =41.8 
CaS0 4 
72.0 
Vs S0 4 " = 42.6 
Vs Ca" =29.4 
nh 4 no 3 
80.3 
NH 4 - =39.2 
II 
d 
z 
NaN0 3 
66.9 
Na' =25.6 
N0 3 ' =41.3 
N0 3 ' = 41.1 from 
NH 4 N0 3 
kno 3 
83.4 
N0 3 ' = 41.3 
K- =42.1 
K’ = 41.8 from 
k,so 4 
MgBr 2 
67.5 
Vs Mg" =25.8 
Br' =41.7 
CaBr 2 
BaBn 
71.2 
Br' =41.7 
'/ 2 Ca" =29.5 
■/g Ca" = 29.4 
from CaS0 4 
It would be noticed from the column lieaded “Remarks” that in 
no case have ionic velocities dilFered by more than 0.3, as obtained 
from different sources. 
Below, is added a comparative table of the ionic velocities as 
obtained by this direct method, and as obtained from Kohlrausch’s 
table 1 ) by calculating with his temperature coefficients : 
Ions 
Velocities at 0° C. as 
obtained directly 
Velocities as calculated 
with temp. coefficients. 
H' 
223.9 
224.3 
NH 4 
39.2 
40.2 
Li ‘ 
19.3 
19.0 
Na' 
25.6 
26.0 
K- 
42.1 
40.9 
'I 2 C a " 
29.5 
X 
Vs Sr " 
31.7 
31.6 
"2 Mg" 
25.8 
26.8 
Cl' 
40.8 
41.5 
NO' 3 
41.3 
40.1 
Br' 
41.7 
42.5 
7 2 SO" 4 
42.6 
42.2 
0 Loc. cit. 
