C 3 f 7 ] 
On fubftituting gold or filver for the tin- 
foil, and making ufe of the fame conduc¬ 
tor, the electricity was not apparent. Af¬ 
ter having excited a glafs cylinder, we 
brought it near the nerve, but it did not 
produce any change. The fame happened 
with a ftick of fealing-wax. When half 
an hour had elapfed, the limb lolt its 
vitality, which could not be recalled either 
by immerfion in hot or cold water, nor 
was even a torrent of electricity directed 
againft the nerves and mufcles themfelves 
capable of awakening the fmalleft motion. 
The life of the nerve in the part which 
is coated is preferved much longer in ani¬ 
mals with warm, than in thofe of cold 
blood, in proportion to the refpeCtive du¬ 
ration of the life of each clafs. Again, 
the life of the nerves in the former does not 
perifli by fuch flow degrees as we have re¬ 
marked in the latter, as in frogs. 
If 
