The temperature dependence of the moment of inertia of a dilute Bose g
as confined in a harmonic trap is determined. Deviations from the rigi
d value, due to the occurrence of Bose-Einstein condensation, reveal t
he superfluid behavior of the system. In the noninteracting gas these
deviations become important at temperatures of the order of TcN-1/12.
The role of interactions is also discussed.