What are the structural devices in the poem "The Raven"?

wrote an essay called , which was published in Grahams Magazine in April
1846. In the essay, Poe gives a detailed account of how he wrote his poem
"," discussing the tone, setting, effect, beauty, and sound of
the poem and briefly touching on the structure of the poem.

The former [rhythm] is trochaicthe latter [meter] is octametre acatalectic, alternating
with heptameter catalectic repeated in the refrain of the fifth verse, and terminating with
tetrameter catalectic. Less pedanticallythe feet employed throughout (trochees) consist of a
long syllable followed by a short [Once up-on a mid-night drear-y€¦]: the first line of the
stanza consists of eight of these feetthe second of seven and a half (in effect two-thirds)the
third of eightthe fourth of seven and a halfthe fifth the samethe sixth three and a
half.

A catalectic (meaning "headless")
structure is Poe's technique of omitting the...