asiness.

When the quiescence of the arterial system is not owing to defect of
stimulus as above, but to the defective quantity of sensorial power, as in
the commencement of nervous fever, or irritative fever with weak pulse, a
great torpor of this system is quickly induced; because both the irritation
from the stimulus of the blood, and the association of the vascular motions
with each other, continue to excite the arteries into action, and thence
quickly exhaust the ill-supplied vascular muscles; for to rest is death;
and therefore those vascular muscles continue to proceed, though with
feebler action, to the extreme of weariness or faintness: while nothing
similar to this affects the locomotive muscles, whose actions are generally
caused by volition, and not much subject either to irritation or to other
kinds of associations besides the voluntary ones, except indeed when they
are excited by the lash of slavery.

In these vascular muscles, which are subject to perpetual action, and
thence liable to great accumulation of sensorial power during their
quiescence from want of stimulus, a great increase of activity occurs,
either from the renewal of their accustomed stimulus, or even from much
less quantities of stimulus than usual. This increase of action constitutes
the hot fit of fever, which is attended with various increased secretions,
with great concomitant heat, and general uneasiness. The uneasiness
attending this hot paroxysm of fever, or fit of exertion, is very different
from that, which attends the previous cold fit, or fit of quiescence, and
is frequently the cause of inflammation, as in pleurisy, which is treated
of in the next section.

A similar effect occurs after the quiescence of our organs of sense; those
which are not subject to perpetual action, as the taste and smell, are less
liable to an exuberant accumulation of sensorial power after their having
for a time been inactive; but the eye, which is in perpetual action during
the day, becomes dazzled, and liable to inflammation after a temporary
quiescence.

Where the previous quiescence has been owing to a defect of sensorial
power, and not to a defect of stimulus, as in the irritative fever with
weak pulse, a similar increase of activity of the arterial system succeeds,
either from the usual stimulus of the blood, or from a stimulus less than
usual; but as there is in general in these cases of fever with weak pulse a
deficiency of the quantity of