tive muscular motions continue, as those concerned in the
circulation, in secretion, in respiration. But the irritative sensual
motions, or ideas, are not excited; as the immediate organs of sense are
not stimulated into action by external objects, which are excluded by the
external organs of sense; which are not in sleep adapted to their reception
by the power of volition, as in our waking hours.

4. The associate motions continue; but their first link is not excited into
action by volition, or by external stimuli. In all respects, except those
above mentioned, the three last sensorial powers are somewhat increased in
energy during the suspension of volition, owing to the consequent
accumulation of the spirit of animation.

* * * * *

SECT. XIX.

OF REVERIE.

1. _Various degrees of reverie._ 2. _Sleep-walkers. Case of a young
lady. Great surprise at awaking. And total forgetfulness of what passed
in reverie._ 3. _No suspension of volition in reverie._ 4. _Sensitive
motions continue, and are consistent._ 5. _Irritative motions continue,
but are not succeeded by sensation._ 6. _Volition necessary for the
perception of feeble impressions._ 7. _Associated motions continue._ 8.
_Nerves of sense are irritable in sleep, but not in reverie._ 9.
_Somnambuli are not asleep. Contagion received but once._ 10.
_Definition of reverie._

1. When we are employed with great sensation of pleasure, or with great
efforts of volition, in the pursuit of some interesting train of ideas, we
cease to be conscious of our existence, are inattentive to time and place,
and do not distinguish this train of sensitive and voluntary ideas from the
irritative ones excited by the presence of external objects, though our
organs of sense are furnished with their accustomed stimuli, till at length
this interesting train of ideas becomes exhausted, or the appulses of
external objects are applied with unusual violence, and we return with
surprise, or with regret, into the common track of life. This is termed
reverie or studium.

In some constitutions these reveries continue a considerable time, and are
not to be removed without greater difficulty, but are experienced in a less
degree by us all; when we attend earnestly to the ideas excited by volition
or sensation, with their associated connexions, but are at the same time
conscious at intervals of the stimuli of surrounding bodies. Th