6 6 THOMPSON YATES AND JOHNSTON LABORATORIES REPORT 
results obtained with solutions close to the isotonic could not, however, be used for 
these calculations, because the error introduced by any slight variation in the con- 
centration or the lymph was very great, and even led at times to negative values, here 
meaningless. Leaving out of account the solutions of i/ioth, i /8th, and 0*15 
gramme-molecular strength, the average results were as follows. The numbers give 
the traction of the total conductivity that must be assigned to the internal solution : — 
Sciatic 
Ulnar 
Distilled water 
0-8 3 I 
0-766 
1 40th gramme molecular 
0-804 
0757 
1 20th „ 
0-775 
0-781 
i/Sth 
o-8i i 
0-852 
I /4th „ „ 
0-832 
0-822 
1/2 
o - 8 10 
0-777 
1 
0819 
0-841 
2 
o-8-i-o 
0-824 
Average 
0-815 
o-8oi 
This series of calculations agrees with the preceding one in assigning about 
80 per cent, of the total conductivity of nerve to the internal solution. With this 
agrees also the rougher estimate based on the fact that a strand of the sciatic had a 
higher specific conductivity than the whole nerve. All the results are, therefore, in 
favour of Macdonald's view that the internal solution of nerve is decidedly more 
concentrated than lymph. 
