cts into the root of the neck, even to a
higher level, Q, Plate 1, than that occupied by the sternal end of the
clavicle, K. If the point of a sword were pushed through the neck above
the clavicle, at K, Plate 1, it would penetrate the apex of the right
lung, where the subclavian artery, Q, Plate 1, arches over it. In
connexion with this fact, I may mention it as very probable that the
bruit, or continuous murmur which we hear through the stethoscope, in
chlorotic females, is caused by the pulsation of the subclavian artery
against the top of the lung. The stays or girdle which braces the loins
of most women prevents the expansion of the thoracic apparatus,
naturally attained by the descent of the diaphragm; and hence, no doubt,
the lung will distend inordinately above towards the neck. It is an
interesting fact for those anatomists who study the higher
generalizations of their science, that at those very localities--viz.,
the neck and loins, where the lungs by their own natural effort are
prone to extend themselves in forced inspiration--happen the "anomalous"
creations of cervical and lumbar ribs. The subclavian artery is
occasionally complicated by the presence of these costal appendages.

If the body be transfixed through any one of the intercostal spaces, the
instrument will surely wound some part of the lung. If the thorax be
pierced from any point whatever, provided the instrument be directed
towards a common centre, A, Plate 1, the lung will suffer lesion; for
the heart is, almost completely, in the healthy living body, enveloped
in the lungs. So true is it that all the costal region (the asternal as
well as the sternal) is a pulmonary enclosure, that any instrument which
pierces intercostal space must wound the lung.

As the sternal ribs degenerate into the "false" asternal or incomplete
ribs from before, obliquely backward down to the last dorsal vertebra,
so the thoracic space takes form. The lungs range through a much larger
space, therefore, posteriorly than they do anteriorly.

The form of the thorax, in relation to that of the abdomen, may be
learned from the fact that a gunshot, which shall enter a little below
N, Plate 1, and, after traversing the body transversely, shall pass out
at a corresponding point at the opposite side, would open the thorax and
the abdomen into a common cavity; for it would pierce the thorax at N,
the arching diaphragm at the level of M, and thereat enter the belly;
then it wo