232 
THOMPSON YATES LABORATORIES REPORT 
This set of figures provides a totally different idea of the distribution of poten- 
tial. There is not a great difference between the whole set of values, the curve of 
distribution is, therefore, a comparatively flat-topped one ; and its small maximum is 
at the mid-point of the nerve. 
Necessary as is such a precaution when only five points are examined, it 
becomes doubly necessary when, for the sake of accuracy, more points are dealt with, 
and when a longer piece of nerve is taken. It has been found, with practice, possible 
to take twenty observations, two at each of ten points (travelling up and down in this 
way) in ten minutes. The success of the method and the value of the precaution are, 
in my opinion, both shown in the details of the following experiment : — 
EXPERIMENT I 
Sciatic Nerve of Dog 
