  The total hadronic cross-section for the interaction of real photons is
extracted from a measurement of the cross-section of the process e+e->e+e- +
hadrons using a luminosity function for the photon flux and form factors for
extrapolating to Q**2=0. The data was taken with the OPAL detector at LEP at
e+e- centre-of-mass energies of 161 GeV and 172 GeV. In the energy range 10 < W
< 110 GeV the total hadronic photon-photon cross-section is consistent with the
Regge behaviour of the total cross-section observed in \gamma p and
hadron-hadron interactions.
