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Article Contents

TITLE PAGE

1.INTRODUCTION

1.1.Description of the Einstein Observatory Focal Plane Instruments

1.2.Cluster Dynamical Evolution

2.PROPERTIES AND MODELS OF THE INTRACLUSTER GAS

2.1.X-Ray Properties of Clusters

2.2.A Description of the X-Ray Gas Distribution

3.CLUSTERS WITH LARGE X-RAY CORE RADII - nXD CLUSTERS

3.1.Irregular, Cool X-Ray Clusters

3.2.X-Ray Double Clusters - A Possible Intermediate

3.3.Relaxed nXD Clusters

4.CLUSTERS WITH DOMINANT, CENTRAL GALAXIES - XD CLUSTERS

4.1.Cluster Dynamical Evolution and the Growth of cD Galaxies

4.2.Virgo - An Unevolved Cluster with a Dominant Galaxy

4.3.Spiral-Rich Clusters with cD Galaxies

4.4.Spiral-Poor Clusters with cD Galaxies

4.5.The Perseus Cluster

4.6.Groups of Galaxies

5.CLUSTER CLASSIFICATION

5.1.Correlations of Cluster Properties

5.2.The Dynamical Stages of Clusters

6.THE VIRIAL MASS DISTRIBUTION

7.X-RAY EMISSION FROM DISTANT CLUSTERS

EPILOGUE

REFERENCES