  Displacement of floating polymer (polyolefin) rafts by steady magnetic field
is reported. The effect is due to the interplay of gravity deforming the
water/vapor interface, contact angle hysteresis and diamagnetic properties of
the liquid support. Magnetic field (ca. 0.06 T) deformed the water/vapor
interface and impacted the interfacial apparent contact angle. This deformation
gave rise to the propulsion force, displacing the polymer raft. The velocity of
displacement of the center of mass of rafts was registered. The effect is
related to the contact angle hysteresis affected by the magnetic field,
enabling the change in the apparent interfacial contact angle. The
semi-quantitative model of the process is suggested
