ON PHTHISIS IN COWS. 
381 
The Joints .—In the shoulder, elbow, and knee, there was 
much inflammation of the ligaments and capsules, and part of 
the synovia was coagulated and curdy, in a manner similar to 
what escapes from an open joint after it has been exposed some 
time. Within the sheaths of the tendons that pass over or are 
in the neighbourhood of the joints, and especially the knee, 
there was very great effusion of serum, and similar coagulation. 
On opening the abdomen, I was surprised to find in the ileum 
a violent case of introsusception. The inside of about two feet 
of it contained at least two yards of the adjoining small intes¬ 
tines, firmly impacted, and having within it another portion of 
intestine firmly embedded. The part into which the other was 
forced was sound ; but the contained portion was almost in a 
gangrenous state, and had much resemblance to a mass of 
coagulated red blood. 
It was from the superior part of the ileum downwards that the 
introsusception had taken place. The colt did not attempt to 
roll, or shew any symptom of diseased bowels when alive. 
Report addressed to the Prefect of Police, by M. 
Huzard, JUN., respecting the pulmonary Phthisis 
OF Cows in Paris and its Environs. 
[Continued from p. 359.] 
I think that, after the facts and the considerations that have 
been stated, we ought no longer to wonder at the frequency of 
pulmonary phthisis among the cows in the Parisian dairies. 
Nevertheless, the apparent caprice in the manner in which it 
attacks individual animals, and makes its progress through dif¬ 
ferent establishments, has given it, among cow-keepers, an air of 
the marvellous, and has left on the minds of persons somewhat 
acquainted with science, but who are unable to appreciate the 
causes of its frequent appearance, an uncertainty as to the na¬ 
ture of this enzootic. I think, however, that a serious exami¬ 
nation of facts, so {^singular in appearance, would easily clear up 
the greater number of the difficulties, and would resolve all the 
questions which your instructions to me contain. 
Why are some cows never attacked by this disease ?” 
** Why do some cows resist its influence longer than others?” 
We know that in all species of animals there arc some that 
resist the most intense causes of disease—even the direst conta- 
