I 73 1 
Experiment LIV. 
I repeated the experiment, and had the 
fame refult, the leg on which the opium 
had not been applied, prefented the ordi¬ 
nary phenomena. 
Experiment LV. 
In a third frog*, I obferved fome feeble 
movements ; but on re-applying the 
opium, the vitality foon difappeared. 
Experiment LVI. 
Of five frogs employed fucceflively, 
four did not give any movements, but the 
fifth was fhocked very forcibly. The 
opium had been upon the nerves from 
nine to ten minutes. 
Experiment LVII. 
The frog (it is always to be underfiood, 
I am fpeaking of prepared ones) which 
had 
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