Recent theories propose that quantum gravity effects may be observable at L
EP energies via gravitons that couple to Standard Model particles and propa
gate into extra spatial dimensions. The associated production of a graviton
and a photon is searched for as well as the effects of virtual graviton ex
change in the processes: e(+)e(-) --> gamma gamma, ZZ, W+W-, mu(+)mu(-), ta
u(+)tau(-), q (q) over bar and e(+)e(-). No evidence for this new interacti
on is found in the data sample collected by the L3 detector at LEP at centr
e-of-mass energies up to 183 GeV. Limits close to 1 TeV on the scale of thi
s new scenario of quantum gravity are set. (C) 1999 Published by Elsevier S
cience B.V. All rights reserved.