[ 57 1 
mg refource to the exciter, the move¬ 
ments took place. 
Experiment XXIV. 
Although the laft experiment appeared 
decifive, yet I could not avoid repeating it 
on feveral more frogs. Whenever the liga¬ 
ture of the nerve was made near its infer- 
tion into the mufcles, the eleftrical fluid 
did not fhow itfelf j but under oppofite 
circumflances it was fufficiently evident. 
By this means, I could at pleafure either 
fufpend the movements, or call them forth, 
by approximating or removing the liga¬ 
ture from the mufcles. 
Experiment XXV. 
I tied the crural nerve of a frog, and 
armed it above the ligature. The other 
crural nerve was detached from the fpine, 
and placed fo as not to touch either the 
tied nerve or its coating. On applying 
the exciter to the coating and the ifolated 
nerve, 
