546 
PROFESSOR WALLEY. 
concatenation of. circumstances that man can bring about. 
Starvation, bad hygienic conditions, exposure, ill usage, de¬ 
bility, and all other similar forces combined, will not produce 
one single case of pleuro-pneumonia. All the cases we meet 
with must have been due to others, and as reasoning and in¬ 
telligent beings, it is our duty to find out where these other 
cases are hidden. 
Pleuro-pneumonia Incurable. 
The assertion that pleuro-pneumonia can be cured is as lit¬ 
tle worthy of consideration as is the doctrine of spontaneity, 
but we cannot pass it by unnoticed. In the early days of my 
acquaintance with the malady, I treated, and assisted in treat¬ 
ing, as many cases of pleuro-pneumonia as most men, and at 
one time thought a cure was frequently effected. The fact 
cannot be too strongly stated that there is no cure for pleuro¬ 
pneumonia ; a lung or a part of a lung once affected can never 
again be restored to its original condition, but, on the contra¬ 
ry, it becomes for many months a slumbering volcano, waiting 
only for the influence of some disturbing agency to again 
rouse it into destructive action. 
Disinfecting Centers of the Disease. 
Now, as to the large cities being, as it is asserted by some, 
distributing or disseminating centers of the disease, I know 
nothing of London, but I have learned something of Dublin, 
and I think it may be allowed that I do know something of 
Edinburgh. In reference to Dublin, there can be little doubt 
but that at one time it was a center from which the disease 
was spread broadcast through the country, but at the present 
time 1 think 1 may confidently say that while it is still a slight 
or probable source of danger, every possible means are taken 
to prevent the infection of the thousands of animals which 
are annually shipped for this and other countries at the port 
of Dublin. From an intimate acquaintance with those en¬ 
gaged in the sanitary work of the port, and with the manner. 
in which this work is carried out, I am in a position to assert 
that no animals passing through the city of Dublin for em- 
