fit of an intermittent fever.

6. _Dyspepsia a pedibus frigidis._ When the feet are long cold, as in
riding in cold and wet weather, some people are very liable to indigestion
and consequent heart-burn. The irritative motions of the stomach become
torpid, and do their office of digestion imperfectly, in consequence of
their association with the torpid motions of the vessels of the
extremities. Fear, as it produces paleness and torpidity of the skin,
frequently occasions temporary indigestion in consequence of this
association of the vessels of the skin with those of the stomach; as riding
in very bad roads will give flatulency and indigestion to timorous people.

A short exposure to cold air increases digestion, which is then owing to
the reverse sympathy between the capillary vessels of the skin, and of the
stomach. Hence when the body is exposed to cold air, within certain limits
of time and quantity of cold, a reverse sympathy of the stomach and the
skin first occurs, and afterwards a direct sympathy. In the former case the
expenditure of sensorial power by the skin being lessened, but not its
production in the brain; the second link of the association, viz. the
stomach, acquires a greater share of it. In the latter case, by the
continuation of the deficient stimulus of heat, the torpor becomes extended
to the brain itself, or to the trunks of the nerves; and universal
inactivity follows.

7. _Tussis a pedibus frigidis._ On standing with the feet in thawing snow,
many people are liable to incessant coughing. From the torpidity of the
absorbent vessels of the lungs, in consequence of their irritative
associations with those of the skin, they cease to absorb the saline part
of the secreted mucus; and a cough is thus induced by the irritation of
this saline secretion; which is similar to that from the nostrils in frosty
weather, but differs in respect to its immediate cause; the former being
from association with a distant part, and the latter from defect of the
stimulus of heat on the nostrils themselves. See Catarrhus frigidus, Class
I. 2. 3. 3.

8. _Tussis hepatica._ The cough of inebriates, which attends the
enlargement of the liver, or a chronical inflammation of its upper
membrane, is supposed to be produced by the inconvenience the diaphragm
suffers from the compression or heat of the liver. It differs however
essentially from that attending hepatitis, from its not being accompanied
with fever. And is perhaps