  A contribution is presented to the study of hadron spectroscopy through the
use of fractals and discrete scale invariance implying log-periodic corrections
to continuous scaling. The masses of mesons and baryons, reported by the
Particle Data Group (PDG), are properly fitted with help of the equation
derived from the discrete-scale invariance (DSI) model. The same property is
observed for the mass ratios between different particle species. This is also
the case for total widths of several hadronic species.
  Each fitted parameter, as a function of the hadronic masses, displays the
same distribution for all hadronic species. Several masses of still unobserved
mesons and baryons are tentatively predicted.
