In P.B. Shelley's poem, "The Triumph of Time," explain similes used in lines 248-291.

In Shelley's "The Triumph of Life," lines 248 to 291,
there are only a few "similes."

You may recall that a
simile, defined by Dr. L. Kip Wheeler, is:

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...an analogy or comparison implied by using an
adverb such as like or
as.

The
comparison must take place between two dissimilar things being compared, like a man and
a bear, or a woman to sunshine.

The first simile
is:

The tutor
and his pupil, whom Dominion

Followed as tame as vulture in
a chain.

In this case, the
tutor and pupil refer to Aristotle and Alexander the Great (the pupil). Dominion is
personified here—meaning rule or control, or,
similar, domination. There is no control between the two men;
neither is stronger than the other—dominion is tamed as if it were
chained.

The next simile
is:

If Bacon’s
spirit [eagle] had not leapt

Like lightning out of
darkness

This refers to
Francis Bacon's move to change the way of thinking that had originally been introduced
by Aristotle, enlightening the world.

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And Gregory and John and men
divine

Who rose like shadows between Man and
god...

...refers to the
separation that rose like a "shadow" between Man and god, blamed on Pope Gregory the
Great by Shelley, describing a separation caused by organized religion, or the
Church.