[ H9 1 
communication, as in the preceding expe¬ 
riments, the limb remained motionlefs. 
I then brought the cut ends of the nerves 
near the veffels, without fuffering them to 
touch the coating, and the exciter pro¬ 
duced very evident movements at feveral 
different times. This does not occur when 
the electricity becomes weak. 
Experiment CXX . 
Having placed the extremity of a bone 
in contact with a prepared frog, I put the 
conductor upon the other end and upon 
the coating. Shocks were excited, which 
ceafed when the bone was divefted of its 
periofteum. 
Experiment CXXL 
In place of the bone, I fubftituted the 
nerves of another frog, and the move¬ 
ments till occurred. 
How can it happen, that parts of the 
I 4 animal 
