and Spinal Marrow of living Animals. 181 
composing the first class, in a dog. His eyes became in- 
stantly dull and heavy ; he tottered as he walked ; foamed at 
the mouth ; vomited two or three times ; breathed with ex- 
cessive difficulty ; his inspirations were long and deep, his ex- 
pirations short and sudden, but not attended with the repeated 
jerks of the abdominal muscles as in the last animal ; he barked 
loud every time he threw out the inspired air from the lungs ; 
the pulse was quicker than before the operation. Next morn- 
ing about half after eight, I found him apparently dead ; but 
on examining more attentively, found he breathed still, though 
exceedingly slow ; his pulse was gone, and he felt cold ; his 
limbs were stretched out. On placing him near the fire, he 
began in a few minutes to breathe distinctly, and the heart 
now and then gave a pulsation ; in about four hours, he seemed' 
to have got to the same state the operation first left him in, 
and barked at every expiration, his pulse beating then fifty in 
a minute. About four in the afternoon he died, having sur- 
vived the operation twenty-eight hours. The. lungs in the 
dead body were found loaded with blood, but not so much as 
to carry them to the bottom in water. The trachea was not 
inflamed. The nerves of the right side, from which a portion 
had been cut out, seemed to have undergone little alteration ; 
they were only a little more vascular than usual, and had the 
rounded swell where they had been divided. The nerves of 
the left side, which had retracted but little, and had been only 
divided, had their extremities covered with a plug of coagu- 
lable lymph. I suspected that the reason of the first dog’s 
dying so soon, was, that none of the nerves had yet acquired 
the power of performing their former offices ; and that, were 
the operations performed at a greater distance of time, the 
