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We examine the relation between optical and X-ray properties of nearby clusters of galaxies. We compare the observed galaxy velocity dispersion in clusters to the X-ray temperature of the intracluster gas through the beta-parameter which relates the average energy per unit mass in the galaxies to that in the gas. The relation is consistent with that expected from an isothermal model where both the gas and the galaxies are in hydrostatic equilibrium with the binding cluster potential. In addition, we find that the galaxy and gas density distribution follow one another; that is, no significant ``beta-discrepancy'' exists.
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