with the known system of nature, and reject those which are
incongruous with it; this is explained in Zoonomia, Sect.
XVII. 3. 7. and is there termed Intuitive Analogy. When we
sleep, the faculty of volition ceases to act, and in
consequence the uncompared trains of ideas become incongruous
and form the farrago of our dreams; in which we never
experience any surprise, or sense of novelty.]

"And last Suggestion's mystic power describes
Ideal hosts arranged in trains or tribes.
So when the Nymph with volant finger rings
Her dulcet harp, and shakes the sounding strings;
As with soft voice she trills the enamour'd song,
Successive notes, unwill'd, the strain prolong; 90
The transient trains ASSOCIATION steers,
And sweet vibrations charm the astonish'd ears.

[Footnote: _Association steers_, l. 91. Association is an
exertion or change of some extreme part of the sensorium
residing in the muscles and organs of sense in consequence of
some antecedent or attendant fibrous contractions. Associate
ideas, therefore, are those which are preceded by other ideas
or muscular motions, without the intervention of irritation,
sensation, or volition between them; these are also termed
ideas of suggestion.]

"ON rapid feet o'er hills, and plains, and rocks,
Speed the scared leveret and rapacious fox;
On rapid pinions cleave the fields above
The hawk descending, and escaping dove;
With nicer nostril track the tainted ground
The hungry vulture, and the prowling hound;
Converge reflected light with nicer eye
The midnight owl, and microscopic fly; 100
With finer ear pursue their nightly course
The listening lion, and the alarmed horse.

"The branching forehead with diverging horns
Crests the bold bull, the jealous stag adorns;
Fierce rival boars with side-long fury wield
The pointed tusk, and guard with shoulder-shield;
Bounds the dread tiger o'er the affrighted heath
Arm'd with sharp talons, and resistless teeth;
The pouncing eagle bears in clinched claws
The struggling lamb, and rends with ivory jaws; 110
The tropic eel, electric in his ire,
Alarms the waves with unextinguish'd fire;
The fly of night illumes his airy way,
And seeks with lucid lamp his sleeping prey;
Fierce o