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jfilken thread, or if the fciffars are in- 
fulated, no movements take place. 
The fmall frogs have like wife prefented 
me with a very lingular phenomenon. 
As they enjoy much vitality, their legs are 
contracted, or drawn upwards with as 
much force as if they were Hill connected’ 
with the body. If, during this ftate of 
contraction, the fpine or the nerves be 
touched with the fciffars, the legs almofl: 
conftantly become relaxed, and fall down. 
I have likewife feen in two frogs the 
movements occur at the diflance of half 
an inch from the fciflars, and which 
ceafed at the moment I infulated the 
fciflars. 
A Hill better manner of exciting the 
electricity is, to hold the feet of the frogs 
between the rings of the fciffars, and incline 
them in fuch a way as to permit the me¬ 
dulla fpinales to fall gently upon them. 
Inftead of two conductors, as in the firfl 
experiment, there is here only one, and 
on 
