  The eta(1760) may be significantly produced in J/Psi radiative decay. We
deduce from experimental data that its branching ratio to two gluons is
bounded, 0.4 +- 0.3 < BR(eta(1760) -> gg) < 0.9 +- 0.3, consistent with gluonic
admixture. Moreover, the expectation that there should be an isoscalar analogue
of the gluonic (hybrid) meson candidate pi(1800) is argued to reinforce hybrid
admixture in eta(1760). Two-gluon coupling of hybrids is estimated in a
spectator model to be considerably larger than that of quarkonium. In addition,
the two-photon coupling of eta(1760) is estimated to be 1.4 +- 0.7 keV.
