*94* Dr. Haighton's experimental Inquiry 
with that branch of the great sympathetic nerve accompanying 
and strongly adhering to them. 
EXPERIMENT. 
A dog being properly secured, and a convenient incision 
made on the fore part of the neck, I divided both the nerves 
of the eighth pair: he became immediately restless and uneasy, 
betraying symptoms of great distress upon the stomach, which 
continued eight hours, when he died. 
Though the result of this experiment is perfectly agreeable 
to what other experimental physiologists have stated, I thought 
it of importance to the present inquiry, to give it confirmation 
by further experiment. I therefore repeated it on two other 
dogs, one of which survived it three days, the other only two. 
From these experiments we learn, that the action of these 
nerves was suspended, and that those vital organs which re- 
ceived their nervous energy from this source, had their functions 
arrested, so that death followed as a necessary consequence. 
It may be said here, by way of objection, that a violent 
shock had been suddenly given to the machine ; and that the 
animal perished rather from the sudden deprivation of the ner- 
vous influence, than from its absolute loss; and that if the same 
quantity had been abstracted in a more gradual way, the ani- 
mal might have survived it. How little validity there would 
be in such an objection, the following experiment will evince. 
EXPERIMENT. 
Another dog being procured, I divided only one of the 
nerves of the eighth pair. I was surprised to see how slightly 
