  We present the rotation curves (RCs) of 967 spiral galaxies, obtained by
folding and deprojecting the raw optical data by Mathewson et al. (1992). Out
of these, we have identified 80 excellent RCs and 820 fair RCs. The 80
excellent RCs are smooth, symmetric, have negligible rms internal error, extend
to at least the optical radius, and have high and homogeneus radial data
coverage; they rival with the best optical one-slit RCs available in the
literature and are ideally suited for detailed mass structure modelling. The
820 fair RCs do not meet at least one of the above criteria and hence are not
suitable for direct mass modelling; however, they constitute a large database
for methods aiming to recover statistical properties of DM. For these 900 RCs
we also present, in figures and tables, the rotation curves smoothed on scales
corresponding to 5%-20% of the optical size. By size, homogeneity, intrinsic
quality, and spanned range of luminosities and asymptotic velocities, this
sample constitutes by far the best sample of RCs available to date. As such, it
will offer a unique opportunity for investigating in considerable depth the
properties of DM in galaxies. The the deprojected folded curves, the smoothed
curves, and various related quantities are available via anonymous ftp at
galileo.sissa.it in the directory /users/ftp/pub/psrot.
