THE 
VETEEINARIAN. 
VOL. XXXVI. 
No. 428. 
AUGUST, 1863. 
Fourth Series. 
No. 104. 
Communications and Cases, 
ON SOME OF THE DISEASES OF THE RESPI¬ 
RATORY ORGANS OF THE HORSE AND 
OTHER ANIMALS. 
By Professor Brown, M.R.C.V.S., London. 
[Continuedfromp. 235). 
Catarrhal affections. 
Taking the entire list of diseases of the mucous membrane 
of the air-passage, the larger portion will be included under 
the term “catarrhal.^^ From the common cold, with its various 
stages, to the well-known though, little comprehended, influ¬ 
enza, the general characters are sufficiently common to permit 
a classification under this head; always providing we are 
allowed to free ourselves from all restraints when pursuing 
our inquiries after once starting in the orthodox way. 
Considering the very commonplace nature of the process 
“ taking or catching a cold,’^ there has been a great deal of 
discussion at different times upon the exact method by which 
the result is achieved; and the rival influences of cold and 
heat have at one time and another had their due share of im¬ 
portance accorded to them; but the observer of some years 
past must have noticed the unaccountable prevalence of 
colds” of the most decided description, irrespective of 
atmospheric change to any extent. The weather may be 
cool or hot, or wet or dry ; there can be discovered no advan¬ 
tage in the one or other as far as the disease is concerned, 
save that a change of any kind commonly is followed by an 
XXXVI. 30 
