O, harp Eolian!

Figure of speech. One of Joyce's headlines refers to a stringed instrument called the Aeolian harp, which carried lofty associations in the 19th century but which in Aeolus becomes a glorified name for some twanging dental floss. Speaking to the floss as if it were a melodious wind harp, the headline employs the rhetorical device of apostrophe, in which an orator turns aside from the audience to address someone or something else.

John Hunt 2023

Source: discover.hubpages.com.

Source: www.examples.com.

Aeolian harp made in London by John & Gerard Vogler ca. 1775-90, held in the Art Museums of Colonial Williamsburg, Williamsburg, Virginia.
Source: emuseum.history.org.

Simon Speed's 2013 photograph of an Aeolian harp made by Robert Bloomfield ca. 1812-23, held in the Higgins Art Gallery & Museum, Bedford, England. Source: Wikimedia Commons.