514 l-HILOSOPHICAL TRANSACTIONS. [aNNO 1795. 



minute; he ate and drank however, even voraciously at times, and had stools; 

 he never attempted to bark or howl, probably because he did not feel great pain ; 

 and yet his attention was not so much disengaged from internal uneasiness, as to 

 be excited with ordinary causes from without; in breathing, the inspirations were 

 low and deep; the expirations were attended with repeated jerks of the abdomi- 

 nal muscles, as if he wanted more effectually to expel what air was contained in 

 the lungs. The 7th day after this 2d operation, he was found dead, at a con- 

 siderable distance from his bed. In the dead body, every thing seemed in a 

 sound state, except the lungs: these contained little or no air; in consequence of 

 which, they sunk to the bottom in water; they were of a red brown colour, re- 

 sembling more the substance of a sound liver, than that of inflamed lungs. The 

 inner surface of the trachea and its branches was exceedingly inflamed, and 

 covered with a white fluid, in some places resembling pus, in others ropy, and 

 more of the nature of mucus. The divided nerves of the right side were united 

 by a substance of the same colour as nerve, but not fibrous; and the extremities 

 formed by the division were still distinguished by swellings, rounded in form of 

 ganglions. The same appearance had taken place, with respect to the nerves of 

 the left side; though the divided extremities seemed to have been full 2 inches 

 apart; the uniting substance was more bloody than that of the other side. This 

 experiment was made to prove that the original power of action in the thoracic 

 and abdominal viscera was independent of the nerves. As I found the nerves 

 regenerated, a circumstance never hitherto observed, it occurred to me, that it 

 might be objected to the reasoning, that the first 2 nerves were doing their office, 

 before the last 2 were divided: to obviate this objection, I made the following 

 experiment. 



Exper. 3. Feb. igth, I divided, at 1 operation, the 4 nerves composing the 

 first class, in a dog. His eyes became instantly dull and heavy; he tottered as 

 he walked; foamed at the mouth; vomited 2 or 3 times; breathed with excessive 

 difficulty; his inspirations v/ere long and deep, his expirations 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 morning about -l after 8, 

 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 4 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 50 in a minute. 

 About 4 in the afternoon he died, having survived the operation 28 hours. The 

 lungs in the dead body were found loaded with blood, but not so much as to carry 



