dividing the nerves of the lungs , &c. 299 
“ lungs the attempt was invariably successful, making the 
“ whole of a bright scarlet colour, and, on cutting into them, 
“ every part was found to be uniformly filled with the in- 
“ jection. 
“ After injecting the diseased lungs, the dark red patches 
“ remained on their surface : other parts of the lungs were 
“ of a bright red colour : some parts were partially injected, 
“ and other parts retained their natural appearance. 
“ This was explained on dissection. Those parts of the 
“ lungs which were completely injected had not suffered from 
“ disease, other parts had suffered sufficiently partially to 
“ obstruct the injection, while some parts were so completely 
“ hepatised that not a particle of injection could enter them, or 
“ the parts beyond them, which were not equally diseased. 
“ Those portions of the lungs which were completely 
“ injected, sunk in water, from the weight of the injection. 
“ The hepatised portions, from their diseased state, sunk 
“ also, whilst the portions beyond them, having their natural 
“ appearance, floated/* 
If, as I have repeatedly ascertained, and various gentlemen 
have witnessed, after the nerves are divided, and the divided 
ends separated, the due degree of voltaic electricity be trans- 
mitted through the lungs, by those portions of the nerves 
which remain attached to them, no affection of the breathing 
supervenes, and the lungs, after death, are found quite 
healthy, unless the electricity has been applied of such power, 
or continued for such a length of time, as to excite inflam- 
mation, and then the appearances on dissection are those of 
inflammation , not those produced by the division of the nerves of 
the lungs. 
