n in direct sympathy; and the lymphatics of the stomach act in
reverse sympathy with those of the lungs and of other parts of the body;
the former of which is caused by defect of the excitement of the sensorial
power of association, and the latter by the accumulation of it.

Besides the efficient cause, as above explained, the final cause, or
convenience, of these organic actions are worthy our attention. In this
case of an acrid drug swallowed into the stomach the reverted actions of
the muscular fibres of the stomach tend to eject its enemy; the reverted
actions of its lymphatics pour a great quantity of fluids into the stomach
for the purpose of diluting or washing off the noxious drug; and the
increased actions of the other lymphatics supply these retrograde ones of
the stomach with an inconceivable supply of fluids, as is seen in Ileus and
Cholera.

7. The inquisitive reader will excuse my continuing this subject, though
perhaps with some repetitions, as it envelopes the very essence of fever.
When the first link of a train of actions is excited by excessive stimulus,
or excessive irritability, and thus acts with unusual energy by the
increased quantity of irritation, these increased motions excite a greater
quantity of the sensorial power of association, which causes increased
motions in the second link, which is catenated with the first; and then the
excessive action of this second link excites also a greater quantity of the
sensorial power of association, which increases the motions of the third
link of this chain of association, and thus the increase of the stimulus on
the irritative motions, to which the chain of association is catenated,
increases the action of the whole chain or circle of associated motions.

After a time the irritative motions become torpid by expenditure of the
sensorial power of irritation, and then the power of association also
becomes less exerted, both because it has been in part exhausted by too
great action, and is now less excited by the lessened action of the
irritative motions, which used to excite it. These are both instances of
direct sympathy, and frequently constitute the cold and hot fit of
intermittents.

But though the accumulation of the sensorial power of irritation during the
quiescence of some motion owing to want of stimulus generally induces
torpor in the first link of the train of associated motions catenated with
it; as the capillaries of the lungs become torpid i