I 247 ] 
is taking place within him. He may 
fometimes flop the progrefs of the aura by- 
ligatures, fridions, or violent movements, 
but it is not fo eafy a matter to flop the 
progrefs of eledricity. He may alfo 
fometimes deftroy the local difeafe by the 
application of blifters, or the adual cau¬ 
tery. But thefe means appear only to change 
the difeafed difpofition of the nerve, and do 
not prevent the accumulation of eledricity 
in it, as its power and energy are conftantly 
preferved. I will not deny that in the ac- 
counts of obfervations which relate to the 
nervous fyftem, we meet with fome which 
are extremely embarrafling, and appear 
to militate againft my theory. But it 
mull be obferved, that nerves are not a 
dead fubftance, but that they poflefs pro¬ 
perties, by which are capable of modify¬ 
ing their fluid, fo that it does not appa¬ 
rently obey the general laws of eledricity. 
Amongft thefe properties of the 
nerves, 
