362 Pleuro- Pneumonia amongst Cattle. 
means ; but the success which has attended the treatment we have 
adopted in healthy cattle themselves, that is^ the application of a 
seton in the dew-lap, induces us to recommend its use in all cases 
when well-grounded apprehensions are entertained as regards 
the liability of cattle to the disease. 
Premonitory Symptoms. 
It is rare that we are called in at the commencement of this 
disease, but when we do see animals in that stage, the following 
symptoms usually present themselves. The first and most im- 
portant of these is a short husking cough, and to which I have 
so frequently alluded in former parts of this paper. This may 
continue for a variable period : sometimes it is observed to com- 
mence but a short time previous to the appearance of other 
symptoms of a less ambiguous nature, while in others it may hang 
upon the animal for some considerable time; soon after this cough 
has set in, a diminution of the natural secretions may be observed, 
and if a cow be the subject of the disorder, her milk becomes 
scanty, and sometimes slightly altered in colour; I have also 
found it to coagulate upon the application of heat. The breath- 
ing is natural while the animal remains tranquil, but upon exer- 
tion, such as when driven to a short distance, for instance, it 
becomes accelerated and laboured. Appetite not perceptibly 
impaired, although the animal looks somewhat lank ; pulse re- 
gular, no appreciable alteration in the temperature of the animal ; 
in some instances diarrhoea sets in spontaneously ; in others there 
is constipation : with the exception of the above mentioned symp- 
toms the animal appears tolerably healthy. 
Although these symptoms may and do exist in most cases for 
a sufficient length of time to warn us of the approach of the suc- 
ceeding active stage of the disease, yet from their comparatively 
mild and doubtful character they elude suspicion ; consequently, 
if observed, they are either neglected, or considered of too little 
importance to require medical treatment. 
This, which I have been in the habit of designating the husk- 
ing stage, is the most important in a practical point of view ; at 
least so far as regards the possibility of saving the life of the animal 
by treatment. 
It is usual, after having described the symptoms of a disease 
through its different stages, to point out those which indicate a 
favourable result, but I have omitted doing so, because I felt 
that the danger an animal runs when affected with this disease 
would be belter" understood after the morbid conditions which 
characterize its different stages had been shown ; and I have 
only to refer to those morbid conditions which we have described, 
and of which I have given illustrations, to show that the danger 
that the animal runs increases as the disease advances. 
