YET ERIN A RI US. 
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peri-bronchitis nodoso. They present themselves as small bodies, 
about the size of a millet seed; they are often numerous, but at 
other times occur only here and there. In the case of bronchitis 
proliferans, these noduli have a gray color, and upon section the 
lumen of the tube can often be seen. In bronchitis catarrlialis 
and caseosa, the centers of the nodules are filled with purulent or 
caseous material, surrounded by pearly-gray tissue, so that what 
was apparently a nodulus is, in reality, nothing but the cross-sec¬ 
tion of an indurated bronchial tube. When the caseous material 
filling the bronchials at such a point becomes calcified, a small 
kernel of lime is found in the center of such a nodulus, and is 
easily removed. 
Bronchostasis is a progressive process by which the lumen of 
a tube becomes greater, and in the horse occurs most frequently 
in the smaller tubes (it can also occur in the large tubes) of the 
anterior and lower, or central lobes, of the lungs; they generally 
occur in multiple form, seldom isolated. According to the thick¬ 
ness of the wall of the tube, they can be classified as: (1) Atrophy, 
and (2) Hypertrophy; according to form, as : (1) Cylindrical, (2) 
Sacculated, and (3) Serpentine, etc. In every case of broncho¬ 
stasis, bronchitis in one form or another is present. Outside of 
them, pneumonia processes frequently come to development. The 
circumscribed or sacculated form often appears as noduli, about 
the size of a pea, but cross-section soon reveals their true nature. 
It should be impossible to mistake any of these conditions for 
the specific one of glanders, though one or all of them may ap¬ 
pear in the same lung at the same time as those of glanders, or 
when there is no evidence of glanders. In fact, they are not un¬ 
common in old horses in all varieties and degrees of development. 
In all glanders noduli, the purulent or caseous mass in the 
center is always in immediate relation with pulmonary tissue; in 
these bronchial conditions, never—the bronchial wall invariably 
forming a line of demarkation. In the latter, the contents can 
always be removed, leaving the wall intact; in glanders, never. 
Another fact of diagnostic value is, that the noduli of glanders 
are seldom of the same age; besides old and anaemic, fresh ones 
are also present. Again : as a rule, the noduli in glanders are of 
metastatic origin, and in doubtful Cases the exact examination of 
