A millstone is a heavy stone used in mills to grind grain into flour, symbolizing both industrial utility and metaphorical burdens. Authors have explored its dual significance: William Carleton uses it metaphorically to illustrate societal pressures, while Various in American Journal of Science outlines its actual role in 19th-century milling.
Agnes Rothery connects it to Milton, Massachusetts, emphasizing its economic legacy, and Jerome K. Jerome contrasts the prosperity of milltowns with social decline. These viewpoints reveal the millstone as a lens for examining labor, history, and human struggle.