ellow; the choroid plexuses
thickened, and of a dark venous appearance; substance of brain firm and
apparently healthy.

From the history of this case, it will be found that D. had at no time
shown any indication that carbon was infiltrated into the lungs. At an
early age he came under the influence of the smoke of coarse linseed
oil, and of gunpowder, while labouring in an unhealthy and
ill-ventilated pit, which produced a cough common amongst colliers, who
may be placed in similar circumstances; and it is evident, that during
the last fifteen years of his life, the carbon--having previously taken
up a lodgment in the pulmonary tissue--was gradually accumulating, and
thereby producing painful dyspnoea, and the other formidable symptoms
connected with the circulating organs, which followed as results, till
it had almost entirely saturated the cellular structure, and rendered
the lungs unfit for the functions of respiration, consequently impeding
the necessary change, through the medium of that function upon the
blood.

There was a marked similarity in the morbid appearances between this
case and that of Reid, (No. 2). They both wrought in the same pit at
Preston-Hall, and were affected in a similar manner. Both had enlarged
liver, and the left lung principally disorganised. Both had extensive
anasarcous and other effusions, and both had coagulable urine. Neither
expectorated black matter, and both died from the bursting of a
carbonaceous cyst into the bronchi, producing suffocation. Duncan lived
longer under the infiltration than Reid did; and this was no doubt owing
to his being younger, and also his healthy occupation latterly.

I have preserved a quantity of the contents of a cyst in the left lung
of this patient, for chemical analysis; also a portion of the blood from
the vena cava, and a little of the black fluid from the bronchial
glands.[17]

CASE 10. (The subject of the following case is still alive, 1845.) J.
S., aged thirty-six. He was born of collier parents, in the parish of
Pencaitland, and at as early an age as eight years, went under ground to
assist his parents in the transmission of the coal, and when fit for
work became a coal-hewer. From his infancy he was rather of a delicate
constitution, with flat and contracted chest. When I first saw him,
which was about eight years ago, (1837), he was in full employment as a
coal-hewer, complaining of shooting pains through his chest, tickling
cough in th