and Spinal Marrow of living Animals. 183 
and in the same order. The vomiting and difficulty of breath- 
ing were rather more considerable ; he ate and drank notwith- 
standing, and had stools. The convulsive jerks of the abdo- 
minal muscles, which hardly took place in the last experiment, 
were observed in this, during expiration, but were not constant, 
as in the first dog. On the 15th of April he was nearly as 
well as before the operations, only he was leaner, and perhaps 
weaker, from the confinement, as well as from the operations. 
I wished to see the state of the nerves ; an artery was opened 
in the groin, and the animal expired in a few seconds. In 
examining the dead body, the viscera were all, to appearance, 
sound. The divided nerves of the right side were firmly 
united ; having their extremities covered with a kind of cal- 
lous substance ; the regenerating nerve, like bone in the same 
situation, converting the whole of the surrounding extrava- 
sated blood into its own substance. The nerves of the left side 
were also perfectly united ; but the quantity of extravasated 
blood having been less, the regenerated nerves were smaller 
than the original ; I observed too, that they did not seem fi- 
brous like original nerves, but the recollection that the callus 
of bone is dissimilar to the original bone, quieted whatever 
doubts could arise from this circumstance. The tonsils were 
considerably inflamed, and this circumstance alone might be 
sufficient to account for the increased secretion of the saliva, 
an attendant symptom of most sore throats ; though I have 
also seen an increase of viscid saliva, in the human species, 
from hypochondriac affections of the digestive powers, and 
also from the causes of temporary debility. The regeneration 
of the nerves which took place in the first dog, and which I 
