ON EMPHYSEMA OP THE LUNGS. 
625 
and evidently had killed it by the force he had used. There could 
be no doubt about the matter, although one would hope that he 
could not see it. Unwilling that the cow should die with the 
calf in her, he actually commenced opening up the mother, and 
took out the calf. If the calf had been alive, and the cow dying, 
this might have been pardoned; but the calf was dead; and 
if he had known his business, he mi^ht have ascertained this in 
a moment. The cow, as might have been expected, soon went 
the same road as the calf. Should not the rascal be punished 
for his temerity ? His employer was a poor man, and a little silly 
(foolish), or he would not have let him act in such a manner. 
ON EMPHYSEMA OF THE LUNGS. 
By Dr. Townsend. 
[Our readers, we are assured, will peruse with interest Dr. Townsend’s admirable 
account of a disease in the human being so closely resembling one species, at least, 
of “ broken wind” in our principal patient. “ Mutate nomine”, and with the exception 
of some minutiffi in anatomy, which either do not exist in the lung of the horse, or which 
we have been too idle to observe, we can follow the learned Doctor in every step of his 
demonstration of the natural and morbid anatomy of the organ, and his delineation of 
he symptoms of the disease. It is the best veterinary lecture on the subject of 
“broken wind” that we know of. It is extracted from “The Cyclopasda of Practical 
Medicine,” now publishing in monthly parts—E d.] 
Emphysema of the Lungs .—The morbid appearances presented 
by this disease have been noticed by Bonetus, Morgagni, Van 
Swieten, Storck, and other anatomists. In this country we have 
a very correct account of an emphysematous lung from the pen 
of Sir John Floyer; and Dr. Baillie’s work on Morbid Anatomy 
contains an accurate description of the three principal circum¬ 
stances which characterize this lesion, namely, the great size of the 
lungs, the dilatation of the cells, and the vesicles formed by ex¬ 
travasation of air under the pleura. The discovery of its frequent 
occurrence as a disease, of its etiology, and diagnosis, was, 
however, reserved for the pathological researches of M. Laennec. 
In order to render the following observations intelligible, it will 
be necessary to premise a few observations on the anatomical 
structure of the pulmonary parenchyma, as the emphysematous 
condition of this viscus is, in many cases, merely an exaggera¬ 
tion of its natural or healthy structure. 
If we examine in a good light the surface of a sound lung, 
we can ascertain by the naked eye, through the transparent 
pleura, that its parenchyma is formed by the aggregation of a 
multitude of small vesicles of an irregularly spheroid or ovoid 
figure, full of air, and separated from each other by opaque 
white partitions. These vesicles, which ou the surface of the 
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