THE INJURY CURRENT OE NERVE 
333 
An examination of the experimental observations tabulated in the two last tables 
establishes some confidence in the average uniformity of action of the two solutions 
upon the injury current of nerve. Either solution may be truly said to produce an 
effect characteristic to itself and different from that produced by solutions of different 
concentration. 
The results obtained are not, however, as great as was anticipated from the point 
of view justified by the examination of solutions of greater concentration, namely* 
that the results of all solutions of KC1 could be summed up in a universally applicable 
' concentration law,' 
Ea> i 1 / \ 
= log — (approx.) 
Ea ^ n 
Thus in the case of solutions of '372 grammes per cent. KC1, the concentration 
in gramme molecules per litre, n, is equal to i. The dissociation constant at this 
concentration is -9. The concentration of the dissociated moiety of the KC1 is nearly 
that of the total KC1 present, 
'3. 
20 
Ea> . 1 
Ea 6 '9 
20 
= log. 22'22 
E« = i -345 x Ea 
But the actual result of the experiments was not this; the final value was smaller 
than such anticipation suggested, and was 
Ew = 1-055 x Ea 
or Eco = Ea log. 1 1 -4 
Similarly, in the case of ■ 186 grammes per cent, solutions of KC1 (i gram, mol.), the 
anticipation of the general law is not fulfilled ; is, indeed, further from attainment 
than in the last case. 
Thus the dissociation constant at this concentration is '93 (approx.) 
•93 
40 
Eft) = Ea loo;. _! — 
!93 
40 
= Ea log. 43 
= Ea x 1-63 
Whereas the result actually obtained was — 
Eft) = Ea x l*20 
Ew = Ea log. 16. 
Q 
