CONTRIBUTIONS TO COMPARATIVE PATHOLOGY. 
No. VII. 
By Mr. Youatt. 
Mange, Pleurisy, Hydrothorax — Metastasis of 
Disease. 
June 13^,1833. — Brown Coati Mundi. As fat as a pig. 
The hair is coming off from the tail, and from the hinder parts 
generally, and the skin of the belly and thighs is red and scurfy. 
Dress for a few days with the mange ointment (simple sulphur 
ointment with common turpentine). Give two grains of calomel 
and an equal quantity of antimonial powder every fourth day, 
and one drachm of the alterative powder (black sulphuret of 
mercury, nitre and sulphur) on each intermediate day. 
V7th. — He looks a little cleaner. Continue treatment. 
27th. — The skin is perfectly clean and healthy. Dismissed. 
July 2d . — He seemed to be perfectly well until this morning — 
and even this morning he played about as usual — when suddenly 
he fell, struggled during about a minute, and died. The brain 
was congested both in its substance and its membranes, but 
the immediate cause of death lay in the chest. The lungs 
were flaccid, yet emphysematous. Nearly one third of each 
lung was lost for the purposes of breathing, and had apparently 
been so for a considerable time ; there had, in fact, been asth- 
matic cough of long standing. We had succeeded in remov- 
ing the mange, perhaps too rapidly so, considering the asth- 
matic cough : it was the work of a fortnight. The old chest 
affection, which was somewhat in abeyance while the skin suf- 
fered, immediately returned — inflammation of the pleura was set 
up : the intercostal pleura was partially covered by an adventi- 
tious membrane of a flaky character ; the chest became filled with 
a yellow serous fluid, and the animal was suffocated. The pecu- 
liarity of the case is, that there was no symptom of illness 
sufficient to generate the slightest suspicion of the mischief that 
was going forward. 
This will somewhat painfully remind us of the connexion there 
frequently is between these cutaneous and asthmatic affections in 
old animals, and the strange intensity which the one acquires 
when the other is hastily withdrawn. If I could cure a confirmed 
asthmatical dog of mange, I would not do it ; if I could quite 
get rid of asthma in a mangy dog, I would not do it. They 
counterbalance and in a manner neutralize each other. Either 
can undermine and destroy, but together they are comparatively 
harmless, until one gets a little too much the master, and then 
