THE INJURY CURRENT OF NERVE 291 
of the nerve in water. On the other hand, an immersion in water succeeds in 
bringing back to and beyond its original value the potential difference from the nerve 
which has been lying in the highly-concentrated solution. 
The inference to be drawn from such facts seems an obvious one. The 'internal 
solution' of the nerve which had been immersed in the concentrated solution had 
become more concentrated, that of the nerve which had been immersed in the dilute 
solution had become more dilute ; the distinction between their final states is revealed 
by a subsequent extreme dilution of their 'external solutions' (action of tap water) 
and subsequent testing. 
EXPERIMENT III 
Sciatic Nerve of Cat 
A piece of Nerve 5 centimetres long 
Nerve immediately after removal 
1 7-0 x 
io — 3 Daniell 
After 25 minutes in i"8 per cent. NaCl solution 
6-6 
>> 
After a further 30 minutes in i"8 per cent. NaCl solution 
3-6 
After a further 15 minutes „ ,, 
2-9 
»? " 
After a further 1 5 minutes „ ,, 
2-6 
>> 
After a further 15 minutes ,, ,, ,, 
2-6 
EXPERIMENT IV 
Sciatic Nerve of Cat 
A piece of Nerve 5 centimetres long 
Nerve 
mmediately after removal 
14-8 X 
10- 3 Daniell 
After 2 
5 minutes in "9 per cent. NaCl solution 
1 1-6 
>> 
After a 
further 25 minutes in -9 per cent. NaCl solution 
9-6 
After a 
further 25 minutes „ „ „ 
6-9 
After a 
further 25 minutes ,, ,, ,, 
6-5 
EXPERIMENT V 
Sciatic Nerve of Cat 
A piece of Nerve 5 centimetres long 
Nerve immediately after removal 
13-5 X 
After 
25 minutes in -6 per cent. NaCl solution 
14-8 
After 
a further 25 minutes in -6 per cent. NaCl solution 
After 
a further 25 minutes „ „ „ 
8-6 
After 
a further 25 minutes „ „ „ 
5-0 
After 
a furtiier 25 minutes „ „ „ 
i-6 
