  We simulate the melting of a 71 A diameter cluster of Cu. At low temperatures
the crystal exhibits facets. With increasing temperatures the open facets
pre-melt, the melted regions coalesce into a liquid envelope containing a
crystalline nucleus, and the nucleus finally goes unstable to the supercooled
liquid. Using critical droplet theory and experimental data for Cu, we explain
the thermodynamics of the coexistence region. The width of the transition
scales as (Number of particles) to the power (-1/4).
