482 MR. youatt’s veterinary lectures. 
perceive, their substance is very dense, and not a trace of any 
fibrous structure can be seen; no folding together or convolution 
of capillary secreting vessels; nothing like the penicilli of the 
liver, or the cryptse of the kidney, or the curious apparatus of the 
pancreas : there are no secerning or excretory vessels ; no cells, 
no ducts ; but one uniform mass of condensed pulpy matter. A 
small portion of fluid, or rather of moisture, follows the knife, 
which does not seem to proceed from any tube or reservoir, but 
to be, as it were, extravasated through their whole substance. In 
fine, although we reckon them among the lymphatic glands, we 
know nothing at all of their function. They are found in all 
our patients, and, I believe, in all the mammalia. 
Their Diseases. —Like the lymphatic glands, they are subject 
to disease, and to disease connected with that constitutional 
affection,—that debility of the circulating or the lymphatic 
system, or both, which is characterized by the name of scrofula, 
and here implicating the glands primarily, and not the ducts of 
another division of the absorbent system. Glanders and farcy, 
as we have already shewn, are not, with strict propriety, strumous 
diseases ; but two classes of our patients, the dog and the 
swine, will afford illustrations of true scrofula, in the enlarge¬ 
ment and occasional ulceration of the thyroid glands; indeed, 
from these swellings in the latter animal the cfisease scrofula , 
swine swellings , took its name. 
Description of Bronchocele in the Dog and Swine. —I have, 
in two or three instances, seen some enlargement of the thyroid 
glands in the colt and in the calf. In the sheep it is far more 
frequent. In young lambs, early dropped and half starved, it 
will generally be found ; and in every case in which I have had 
opportunity to trace the progress of the rot, I have found en¬ 
largement of the thyroid glands contemporary with, or marking 
out, the precise period when the stage of debility and emaciation 
commenced. In the swine and the dog, however, we have most 
frequent opportunities of observing this disease. The first is 
not, indeed, often submitted to medical treatment; but you 
cannot have failed to observe in young pigs neglected, half-fed, 
and ricketty, enlargements of a considerable size on each side of 
the upper part of the neck. 
In the dog it is almost daily forced upon our notice. If a 
spaniel or a pug-puppy is mangy, pot-bellied, ricketty, or de¬ 
formed in the joints, he seldom fails to have some enlargement of 
the thyroid glands ; the spaniel and the pug are most subject to 
this disease. The jugular vein passes over the thyroid gland ; and, 
as that substance increases, the vein is sometimes brought into 
sight, and appears between the gland and the integument, fearfully 
