and Spinal Marrow of living Animals , 185 
on the neck, if below the origin of the phrenic nerves, would 
not, for many hours after, destroy the anircial ; it was prepara- 
tory to the following experiment. 
EXPERIMENT VIL 
April 26th, I divided all the nerves of the first class, in a 
dog. The principal symptoms of experiment in. took place. 
Soon after, I performed on the same animal the operation of 
experiment vi.; the symptoms peculiar to this operation also 
took place, whilst those peculiar to experiment nr. disap- 
peared. His respirations were five in a minute, and more re- 
gular than in experiment hi.,; the pulse beat 80 in a minute. 
Five minutes after, I found the pulse 120 in a minute, respi- 
ration unaltered ; at the end of ten minutes the pulse had again 
sunk to 80 in a minute, respiration as before. At the end of 
fifteen minutes, the pulse was again 120, respiration not al- 
tered. The operation was performed about two in the after- 
noon, at Mr. Hunter's, in Jermyn-street. At three quarters 
of an hour after five, the respirations were increased to fif- 
teen in a minute ; the pulse beating 80 in the same time, and 
very regularly ; the breathing seemed so free, that he had the 
appearance of a dog asleep. At a quarter before eight, the 
pulse beat 80, respirations being ten in a minute. At three 
quarters of an hour after ten, respiration was eight in a mi- 
nute, the pulse beating 60. The animal beat was exceedingly 
abated : I applied heat to the chest, he breathed stronger, and 
raised his head a little, as if awaking from sleep. At half 
after twelve, Mr. Hunter saw him ; the breathing was strong, 
and twelve in a minute, the heart beating forty-eight in the 
mdccxcv. B b 
