Do you pronounce it Joule's to rhyme with schools,
Joule's to rhyme with Bowls,
or Joule's to rhyme with Scowls?
Whatever you call it, by Joule's,
or Joule's, it's good! -- Advertising slogan of the Joule brewery. The name, and the corresponding unit of energy, are now usually pronounced so as to rhyme with “school.”
Thumbnail: Roller coaster "Blue Fire" at Europa Park. Image used with permission (CC SA 3.0; Coaster J).