338 
THOMPSON YATES LABORATORIES REPORT 
is probably explainable in terms of the temperature of the air in which the observations 
were made, 23-5° C (July 16, 1901). The solutions were, of course, kept at the 
standard temperature of 1 8° C, but the actual measurements were necessarily affected 
by the temperature of the electrodes and of the moist chamber which were at the 
temperature of the room. 
This average initial value, greater than usual, has induced me to withhold these 
experiments from their proper place amidst those previously given ; where, had it 
been possible, I would have preferred to have produced tables in which the experi- 
ments were in each case so many and so distributed over different periods of the year 
(different room temperatures) that the average initial value observed should have been 
in each case the same. For then the average final values can be expressed in terms 
of the general average initial value. 
KCl (-93 GRAMMES PER CENT.) 
gramme equivalent molecule per litre) 
N 
umber of Experiment 
Ea 
Ea) 
Ew 
E^ 
k 
n 
Experiment CLXXXV (1) ... 
22-44 
20-59 
0-917 = 
log. 
8.27 
> > 
CLXXXVI (1) ... 
21-91 
2K12 
0-964 = 
9 20 
CLXXXVII (1) ... 
21-91 
20-59 
0-94.0 = 
8-71 
CLXXXVIII(i) ... 
21-91 
•9'54 
0-892 = 
7-80 
5 > 
CLXXXIX (1) ... 
22-70 
2 y 22 
1-023 = 
10-55 
> ) 
CXC (1) ... 
22-57 
20-33 
0-900 = 
8-oo 
CXCI (I) ... 
26-66 
2 +' 2 9 
0-911 = 
8-15 
Average of 
nerves 
seven experiments all upon 
marked (1) 
22-87 
21-38 
°'935 = 
log. 
8-6 1 
Ew = Ea log. 8*6 1. 
From this case then k „ , 
- = O'DI 
n 
and, since n = I x '85, the dissociation factor at this concentration being -85, 
therefore 
1 8-6i Qr 
k = -5- x -85 
= '9 1 
and the ' concentration law,' judged from this instance, is 
Eoj = Ea log. -2i 
n 
