investigations,
that the bronchial glands in such persons invariably contain
carbonaceous matter which has been inhaled at some period of life.
Having long entertained the belief that the lungs of chimney sweeps, for
example, would, in all probability, be found to contain carbon, within
the last few months two cases, of an exceedingly interesting character,
connected with the present inquiry, have presented themselves,--the one
of pulmonary disease, evidently resulting from the bronchial and
lymphatic glands being impacted with inhaled carbon derived from
soot,--the other a case of melanosis occurring in a young person. Though
the two diseases differ materially, they have often been confounded with
each other and assigned to the same cause. My object in here reporting a
case of stratiform melanosis, in connection with a disease having an
external origin, is to afford an illustration of the fact, that all
black deposits found in the system are not carbon. There exists a marked
chemical distinction between the melanotic and the carbonaceous matter;
and the anatomical situation of the two is also different.

CASE.--A chimney sweep, aged 50, of the name of Campbell, residing at
Stockbridge. The short history of his case I procured from his friends,
as I did not see him during his illness. He had been a soldier in early
life, and had seen much foreign service. After he relinquished the army,
he became a chimney sweep, in which capacity he was constantly engaged
for nearly twenty years. He had had, for a considerable time, a
troublesome cough with tough expectoration. He experienced a difficulty
of breathing in making any exertion, and he had considerable oedema of
the limbs. From these symptoms he believed that he was subject to
_asthma_. He had only been confined to bed for two days previous to his
death.

_Post-mortem Appearances._--The body exhibited extensive anasarca; the
thorax was well arched; the cartilages of the ribs were ossified. On
removing the anterior part of the chest, the pleurae were found to adhere
strongly, and appeared rough and puckered from extensive exudation of a
brown colour, which extended very generally over the serous membranes.
Both cavities contained nearly three gallons of light brown fluid. The
pericardium was considerably distended with a straw-coloured fluid, and
several flakes of lymph floated throughout the effusion. Both auricles
of the heart were enlarged, and distended with exceedingl