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Updated: June 25, 2025
These canals, which belong to the dorsal part of the head-coelom, and which we may call briefly pleural ducts, receive the two pulmonary sacs, which develop from the hind end of the ventral wall of the head-gut; they thus become the two pleural cavities.
It is true that no less a personage than the "Father of Medicine," Hippocrates, is reputed to have practised succussion as a means of diagnosis; that is, the shaking of a patient, as one would shake a cask, to ascertain by the occurrence or non-occurrence of a splashing sound if the person's pleural cavity was distended partly with water and partly with air.
Kugler recites the description of the case of an arrow-wound of the thorax, complicated by frightful dyspnea and blood in the pleural cavity and in the bronchi, with recovery. Smart extracted a hoop-iron arrow-head, 1 3/4 inches long and 1/2 inch in breadth, from the brain of a private, about a month after its entrance. About a dram of pus followed the exit of the arrow-head.
In chronic hog-cholera, pleural exudation, adhesions and abscesses in the lung tissue may occur. Inflammations of the pericardium and heart muscle are less common lesions. PREVENTIVE MEASURES. Hog-cholera is the most widespread infectious disease of hogs, and all possible precautions against its distribution to healthy herds should be practised.
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