  We present the rotation curves of 967 spiral galaxies, obtained by
deprojecting and folding the raw data published by Mathewson et al. (1992). Of
these, 80 meet objective excellence criteria and are suitable for individual
detailed mass modelling, while 820 are suitable for statistical studies. A
preliminary analysis of theire properties confirms that rotation curves are a
universal function of luminosity and that the dark matter fraction in spirals
increase with decreasing luminosity. Quantitative considerations on the virial
radius of dark halos allow us to make hypotheses about their structure and
nature. The deprojected folded curves, the smoothed curves, and various related
quantities are available via anonymous ftp at
ftp://galileo.sissa.it/users/ftp/pub/psrot
