How do the structures of "It Sifts from Leaden Sieves" and "The Snow-Storm" affect the poems? The halting structure of “It Sifts from Leaden Sieves” suggests resistance to the weather; the more flowing structure of “The Snow-Storm” suggests a more accepting attitude. The halting structure of “It Sifts from Leaden Sieves" mimics a long, enduring blizzard; the more flowing structure of “The Snow-Storm” mimics a brief spell of flurries. The halting structure of “It Sifts from Leaden Sieves" suggests that the snowfall is a surprise; the more flowing structure of “The Snow-Storm” suggests that the snowfall is expected. The halting structure of “It Sifts from Leaden Sieves" depicts a calm weather event; the more flowing structure of "The Snow-Storm" suggests a wild, untamed force.