se_, _Progress_, and _Morbid
Appearances_ of this deadly malady, as they came under my notice.

* * * * *

From a variety of cases to which my attention was directed, I I have
selected _ten_, with the _post-mortem_ appearances in nine of them.
These cases extend over a period of eleven years, all of them
exhibiting, with some slight variation, the same character of disease,
and proceeding from the same cause--inhalation of carbonaceous matter.
Some of the cases occurred as far back as the years 1833-34, while the
last case came under my notice within these twelve months. Of the ten
patients, six were engaged at one period with stone-mining, and four
were entirely coal-miners; eight expectorated carbonaceous matter, and
two did not show any indication of black infiltration from the sputum;
six exhibited, on examination, most extensive excavations of the
pulmonary structure; and three only general impaction of these tissues,
with numerous small cysts containing black fluid; the body of the tenth,
I regret to say, was not examined, owing to neglect in communicating in
time the death of the patient, which took place a few weeks ago. These
morbid appearances exhibit three stages of the disease in regular
progression. The first is that where the carbon is confined to the
interlobular cellular tissue, and minute air-cells, producing cough,
dyspnoea, slight palpitation of the heart, and acceleration of pulse,
while, at the same time, the patient continues able to prosecute his
daily employment. The respiratory sounds, in this state of the chest,
are loud and distinct. Such a condition of the pulmonary structure is
often found on examination in the Carron _iron-moulder_, who has been
killed by accident, or has died from some other disease, having been
subjected in the course of his employment to the inhalation of
carbonaceous particles.

The second is that stage where the softening has commenced in the
several impacted pulmonary lobular-formed small cysts throughout the
substance of one or more lobes, the contents of which may either be
expectorated or remain encysted, giving rise to most harassing cough,
laborious breathing, and palpitations, dull resonance of chest, and
obscure respiratory murmur. The third and last stage, is that in which
the several cysts in one or more lobes have approximated each other,
forming extensive excavations, the prominent symptoms of the disease
becoming considera