542 HUSK — PHTHISIS— DISEASED LUNGS IN A COW. 
diseased terminations of the bronchial tubes, or air-cells. They — 
the air-cells — appeared to be thickened and coated with the same 
concrete, yellow, gritty substance as found in and around the ulcers 
in the trachea and bronchial tubes. 
In many of the larger hard tubercles their centres were in a soft- 
ening state, and enclosed in a cyst or capsule, as the matter could 
be clearly turned out, leaving only a thin covering. In several places, 
towards the surface of the lungs, the tubes were entirely disorganiz- 
ed, thickened, and only containing concrete matter. Some parts were 
one dense mass of similar matter, and only shewed the smaller lobes 
by cutting them across. In one large portion of the lungs I found that, 
at the extreme end of the bronchial tubes, they opened into large 
abscesses of muco-purulent matter ; indeed the matter was almost 
similar to the mucus. These abscesses, at the edges and surface 
of the lungs, would seem as if they occupied the whole smaller di- 
visions, or lobuli, as they could be clearly dissected out from the sur- 
rounding intervening cellular tissue. They had, externally, a yellow 
white appearance, and there were similar ones more deeply seated 
in the neighbourhood. 
As a contrast to this, there were, at other places, large portions 
of the lung that were in a truly hepatized state, and the pleura 
covering them was very vascular. On cutting into them, they had 
a beautifully variegated appearance, being, in some places, of a 
pinkish hue, in others of a yellow-white colour, and, in others, of 
a streaked white. The pinkish hue was the condensed parenchy- 
matous tissue, and forming the boundary ; the yellow- white parts 
were nothing more than diseased bronchial tubes, as in the centres 
were distinct openings of various calibre. These bronchial tubes 
were very much altered in texture, thickened in their coats, and 
lined within with a similar concretion to that deposited in most 
other parts, and with scarcely any mucus. The white streaks were 
the connecting cellular membrane. 
In one-half of the lungs, at different parts, there was the last- 
mentioned peculiar deposit of yellowish solid matter, and no traces 
of the bronchial tubes to be found; with merely a few bands of 
condensed cellular tissue on the boundaries of the different small 
lobes. Some of these masses were half as large as one’s head, 
and, here and there, in their centre, a softening process had com- 
menced; but, in many, nothing of the sort could be found. In 
short, it appears to me not at all improbable, that this enormous mass 
of disease takes its rise in the central and principal bronchial 
tubes, and gradually extends to the pleura, giving the lungs that 
hard granular feeling externally. This I proved by tracing a great 
many of the tubes to their terminations underneath the pleura, and 
in which place they were thickly set together, and the size of 
