f 67 ] 
juft perceptible; I mean of the tied fide, 
for the other leg continued to be ftrongly 
agitated. Here our experiments termi¬ 
nated'. 
On repeating this kind of experiment 
by myfelf, I have frequently obferved, 
that the legs of which the nerves had 
been tied at a certain diftance from the 
mufcles, did not feel the aCtion of a cer¬ 
tain quantity of artificial electricity, al¬ 
though they were violently convulfed by 
exciting that which was inherent and pe¬ 
culiar to them. 
Perhaps this observation may ferve to 
furnifh us with a criterion, by which we 
may be enabled to calculate the force of 
animal electricity. If, for example, five, 
fix, feven, or eight degrees of artificial 
electricity are not fufficient to awaken the 
mufcular movements, and we can pro- ^ 
duce them by the native electricity; we 
lhall be warranted in concluding, that it 
F 2 is 
