[ 7§ J 
quarter of an hour I fo fatigued it by ex¬ 
citement, that it appeared to lofe all marks 
of vitality. I then palled to the other, 
which leaped vigoroufly when touched by 
the conductor, and Ihewed ligns of life for 
at leaf an hour and a half afterwards. 
Experiment LXII. 
The mufcles of three frogs which had 
been immerfed in a folution of opium, 
continued their movements. An hour 
before, they were forced to fwallow a 
folution of opium in warm water. 
Experiment LXIII. 
Having walhed the addudter mufcles and 
the triceps of the thigh with the fame folu- 
tion, their movements, infead of being 
weakened, were evidently increafed by it. 
Experiment LXIV. 
A quantity of a folution of opium was 
poured between the ikin and thigh of two 
frogs. 
