  A first measurement of the cross section of the process e+e- -> Z gamma gamma
is reported using a total integrated luminosity of 231 pb^-1 collected with the
L3 detector at centre-of-mass energies of 182.7 GeV and 188.7 GeV. By selecting
hadronic events with two isolated photons the e+e- -> Z gamma gamma cross
section is measured to be 0.49 +0.20 -0.17 +/- 0.04 pb at 182.7 GeV and 0.47
+/- 0.10 +/- 0.04 pb at 188.7 GeV. The measurements are consistent with
Standard Model expectations. Limits on Quartic Gauge Boson Couplings
a_0/Lambda^2 and a_c/Lambda^2 of -0.009 GeV^-2 < a_0/Lambda^2 < 0.008 GeV^-2
and -0.007 GeV^-2 < a_c/Lambda^2 < 0.013 GeV^-2 are derived at 95% confidence
level.

High Energy Physics - Experiment