[ IS ] 
Experiment VII. 
My friend, Mr. Moorcroft, Veterina¬ 
rian Surgeon, invited me to attempt the 
experiment upon a horfe. 
The^ heart remained motionlefs, al- 
though it was prepared as foon as the 
animal was killed, which was effected 
alrnoft inftaritaneoufly by the divifion of 
the medulla fpinalis of the neck. We 
prepared the phrenic, common intercoflal, 
and eighth pair of nerves, without, pro¬ 
ducing any appearance. The brachial 
plexus was laid bare, and wrapped in tin 
foil without being divided; on touching 
the coating and the neighbouring mufcles 
with a filver fpoon, the leg was not com-, 
vulfed, but ofcillations and tremblings 
took place in the mufcles of the fhoulder. 
On eftablifliing a communication between 
the coating and the nerve, the move¬ 
ments were exceffively ftrong. The leg, 
fhoulder, 
