1. Refrain: The refrain "And there sat Sam, looking cool and calm, in the heart of the furnace roar" is repeated throughout the poem, emphasizing Sam's stoic acceptance of his fate.
2. Rhyme Scheme: The ABAB CDCD rhyming scheme creates a sense of rhythm and repetition within each stanza.
3. "Cold" and "Warm" Imagery: The words "cold" and "warm" are repeated in various forms to highlight the contrasting temperatures and environments that Sam experiences.
4. Descriptions of Sam's Appearance: Sam's physical appearance, particularly his frozen state and the changes he undergoes during the cremation process, are described repeatedly.
5. "Damned" and "Hell": The terms "damned" and "hell" are repeated to convey the extreme conditions that Sam faces in the furnace.
6. "Poor Sam McGee": The phrase "poor Sam McGee" is repeated to evoke sympathy for Sam's unfortunate situation.
Overall, the repetition in the poem helps create a sense of rhythm, emphasis, and emotional impact. It reinforces the key themes of the poem, such as the harsh realities of life in the Yukon, the inevitability of death, and the idea of a "fiery end" as a release from suffering.