E 8. j 
Experiment LXX. 
Opium applied to ifolated mufcles for 
one time only in twenty trials, extin¬ 
guished vitality inflantaneoufly. 
Experiment LXXI. 
The mufcles of live frogs have become 
infen fible to mechanical ftimuli, after 
opium has been applied to them or their 
nerves for fome time. They have, not¬ 
withstanding, obeyed the power of the 
conductor as often as I have expofed them 
to its influence. 
There is reafon to prefume, that opium, 
even when applied to the mufcles, adts 
upon the nerves, and not at all upon the 
mufcular fibre. Confequently the immo¬ 
bility of parts arifing from this caufe, 
may be confidered as the effedt of an. 
> ' 
affedtion of the nerves, and not of the 
irritable fibre. We fhall, however, here- 
G after 
