  We present further observational evidence of the effects of a centrifugal
barrier in GRO J1744-28, based on continued monitoring of the source with RXTE.
For X-ray pulsars, the centrifugal barrier manifests itself in the cessation of
pulsed emission when the source becomes faint. We show that such phenomenon
occurred repeatedly for GRO J1744-28, following the decay of two X-ray
outbursts. This has allowed a direct measurement of the dipole field strength
for this pulsar. Here we argue that some of the other peculiar properties
observed of this source may also be related to an active centrifugal barrier.
