at an average twelve ounces of
fluid, resembling liquid blacking, daily; and he died in a manner
similar to his brother, Case No. 1. Some weeks previous to his death,
his pulse rapidly sank to about 45 or 50, and became exceedingly
feeble;--cold extremities, oedema of the legs and arms, lividity of
lips, eyelids, and ears, preceding dissolution.

_Post-mortem examination._--The chest was contracted; the ribs
unyielding, with extensive adhesions of the pleurae. Both lungs were of a
dark-blue colour, much puckered from patches of false exudation. There
was extensive effusion into both cavities of the chest; and the right
lung showed carbonaceous infiltration throughout its whole extent. The
superior lobe was excavated, so as to contain a small orange; and about
six ounces of thick, black matter were found in it. The middle lobe was
crepitant, though soaked with black fluid; several impacted lobules were
scattered throughout its substance. The inferior lobe was indurated,
resembling a piece of moist peat. The left lung was cavernous in both
lobes, and the cysts were empty, the contents having been expectorated.
A small portion of the upper lobe was pervious to air. There were
several enlarged bronchial glands at the root of both lungs; and the
tracheal glands contained black fluid. The liver was large, and its
substance soft.

_Head._--There was extensive congestion of the blood-vessels of the
brain, with effusion into the lateral ventricles. The viscera of the
abdomen were extensively congested, with slight effusion into the
peritoneal cavity.

It will be observed in referring to the history of this case, that till
the time this man became a stone-miner, and carried on his operations
with the aid of gunpowder, he had no symptom of the disease of which he
died, and it is evident that the disease, if commenced at all, had made
little or no progress till after his return from Penston colliery to
Pencaitland, and after he had inhaled the residuum of gunpowder
combustion, therefore the disorganization of the pulmonary structure was
to all appearance effected between the summer of 1836 and December 1838,
showing decidedly the very irritating character of gunpowder smoke upon
the delicate tissue of the air-passages.

CASE 9. J. D., aged 37, at his death, April 1844. He was a well formed
man, with a fully developed chest. At so early an age as seven years, he
engaged in the labour of the coal-pit at Preston-Hall, Mid-Lothian