HIPPO - PAT H OLOG Y . 
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that it loses this, and especially when it has turned to a thick, 
turbid, dingy-looking mucus, clinging to the nostrils of the horse, 
and sticking with gluey tenacity to the fingers of the person in- 
specting them, we must — -should we not have done so before — 
take care to remove the animal into a stable or box apart from 
other horses; and, at the same time, advise his owner of our 
suspicions of his ultimately becoming glandered. This, however, 
is a part of my subject which cannot be thoroughly understood 
until the disorders, “ nasal gleet” and “ glanders” come to be 
considered. 
PROGNOSIS. — Of itself, a catarrh is an innocuous painless dis- 
order, often so mild as hardly to call for medical interference, and 
never resisting such counter-agency for any very long period of 
time. It is only from its sequelce that adverse results, and occa- 
sionally even fatal consequences, are to be dreaded : I mean bron- 
chitis and roaring, nasal gleet and glanders. 
PATHOLOGY. — Observations in this field of veterinary practice 
are well calculated to throw a light upon one or two extremely 
interesting and still disputed points touching the cause and nature 
of catarrh in general. I have already endeavoured to shew, from 
results of every day occurrences, that the disorder among horses 
appears attributable to heat, and not to cold ; although from the 
circumstance of that heat acting in combination with miasms 
generated in situations where horses are congregated, it may be 
difficult, in many instances, to discriminate between the effects 
of heat and of this insalubrious condition of the atmosphere. In 
very foul situations, we have not only cases of catarrh occurring, 
and those of unusual severity, but we meet with cases of glanders 
and farcy, and ophthalmia : clearly evincing that at least these 
latter diseases are attributable to the impurities of the atmosphere, 
which are at all times rendered more influential by the accom- 
paniments of heat and moisture. We cannot demonstrate that 
inflammation is present in every case of simple catarrh or de- 
fluxion ; but when it is, I see no reason for viewing it otherwise 
than as common phlegmon : though in cases of scarlatina, and some 
forms of influenza, the appearances the membrane assumes, toge- 
ther with the products from it, are such as to induce us to a different 
conclusion. The seat of catarrh is the Schneiderian membrane, 
and in particular that portion of it enveloping the septum nasi. 
From this it mostly extends to that part covering the turbinated 
bones, in which situation it is apt to occasion some degree of stop- 
page in the nose, arising either from tumid condition of the mem- 
brane, or from augmented secretion. Should it extend to the 
fauces and larynx, the consequence will be sore throat. In the 
windpipe and its branches — throughout which the same membrane 
