306 
THOMPSON YATES LABORATORIES REPORT 
The solutions were made up with pure chemicals dissolved in distilled water. 
Great care was taken to insulate all the conducting paths used in the measure- 
ments taken, with the intention of making the results obtained as reliable as possible. 
For the same reason the drying of the nerve was always complete, and the attempt 
at drying the nerve after immersion in a solution was always carried to a point 
when the nerve left no further visible trace of moisture upon the filter paper used. 
The measurement of potential difference was always accomplished by the usual 
compensation method. A large (quart) Daniell cell being carefully made up each 
morning for experiments carried out in the afternoon. 
All the figures given are the result of quite separate experiments, in each of 
which an initial value and a final value for the potential difference having been 
obtained, before and after immersion, the nerve was thrown away. 
In all cases the nerves used were, as stated above, the sciatic nerves of cats. 
Table of Experiments 
Concentration of the 
Solution Used 
Potential Difference 
(0 
In grammes 
per cent. 
w 
In 
gram-molecular 
per litre 
(0 
Initial Value 
x 10 — 3 Daniell 
W 
Final Value 
X 10 -3 Daniell 
(3) 
Final value in 
terms of the 
initial value as 
unity 
Number of Experiment 
Solutions of Hydro- 
chloric acid HCl 
'2 
• I 
•02 5 
•OI25 
" 181 
1 
145-2 
1 
290-4 
13-46 
13-99 
15-84 
18-48 
4'22 
8-71 
19-27 
28-25 
0-3 I 
0- 62 
I -2 I 
1- 5I 
Experiment I 
II 
HI 
IV 
(1) 
(1) 
(1) 
(1) 
loride 
5"3 5 
I 
14-52 
o-66 
•O45 
Experiment V 
(1) 
5'35 
I 
18-74 
1 -92 
• I02 
VI 
(1) 
1 K " 
0 
2*67 
2-67 
1 
2 
1 
15-05 
17-16 
4- 89 
5- 68 
'3 2 5 
•330 
VII 
VIII 
(2) 
(2) 
< 
1-33 
0-67 
1 
1 
1 
14-52 
I3-73 
9-50 
12-14 
•654 
•884 
IX 
x 
(1) 
(2) 
