740 
ON CIU)UF IN VOUNG CATTLK. 
o’clock the haemorrhage re-appeared. It bid defiance to every effort 
to arrest it, and the animal died at nine o’clock. 
‘‘ The right lobe of the lung was perfectly sound—the left lobe 
slightly inflamed. The bronchi on that side contained a little clotted 
blood- At the superior and back part of the windpipe there ap¬ 
peared ten or a dozen little rounded ulcers, from which the blood 
seems to have proceeded. There was nothing of the kind in any of 
the bronchial passages. It would seem probable that these ulcers 
resulted from the detachment of the false membrane of which men¬ 
tion has been made. 
“ I do not affirm that this is an undoubted case of croup, although 
when I trace it from its commencement, the separation and expul¬ 
sion of the tracheal membrane is favourable to this supposition. It 
may, however, be a simple case of hemoptysis. Still it is a curious 
case, and stands alone.’* 
Professor Gohier was anxious to ascertain the causes of croup. 
It was produced by epidemic influences: of that we had daily 
proof. It was sometimes connected with the existence of some pul¬ 
monary or tracheal affection; but was it attributable to the causes 
which many imagined! Could it be produced by art, or was it the 
consequence of some pungent gas existing in the stable ! 
He placed in a small stable, in a low situation, three horses, a 
mule, an ass, a sheep, and four dogs; and then tried what effect 
would be produced by filling it with oxygenated muriatic gas. 
When the gas was sufficiently developed, he shut the door and the 
windows. A man could not have remained in the place two 
minutes, yet, with the exception of one dog, who coughed several 
times because he laboured under pulmonary catarrh, not one of these 
animals exhibited the slightest symptom of croup. 
On the following evening the sheep died. He had been cas¬ 
trated the night before the experiment. 
On opening him, there was no morbid appearance either in the 
trachea or the viscera; but the spermatic cords were partly gan¬ 
grened, as was also the internal lining of the scrotum, in which 
there was a considerable quantity of clotted blood. 
In the morning he repeated the experiment; but the quantity of the 
substances employed was doubled—the muriate of soda, sulphuric 
acid, and oxide of manganese, and care was taken that sufficient heat 
was employed. All the dogs coughed a little, particularly the one 
that had pulmonary catarrh. The monodactyles did not appear to 
be in the least annoyed. The ass and the mule fed during the time 
of the fumigation, although it was so strong that we could scarcely 
see on entering the stable, nor could any of us remain in it more 
than a minute. Two hours afterwards all the animals appeared to 
