  Magnetic elements on the quiet sun are buffeted by convective flows that
cause lateral motions on timescales of minutes. The magnetic elements can be
observed as bright points (BPs) in the G band at 4305 {\AA}. We present
observations of BPs based on a long sequence of G-band images recorded with the
Dutch Open Telescope (DOT) and post-processed using speckle masking techniques.
  From these images we measured the proper motions of isolated BPs and derived
the auto-correlation function of their velocity relative to the solar
granulation pattern. The accuracy of BP position measurements is estimated to
be less than 23 km on the Sun. The rms velocity of BPs (corrected for
measurement errors) is about 0.89 km s$^{-1}$, and the correlation time of BP
motions is about 60 s. This rms velocity is about 3 times the velocity measured
using cork tracking, almost certainly due to the fact that isolated BPs move
more rapidly than clusters of BPs. We also searched for evidence of vorticity
in the motions of G band BPs.
