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   61208
   A low luminous distant cluster of galaxies A777(z=0.224) is selected
   from the complete sample of nine rich cluster (richness >3 and galaxy
   counts > 200) listed in Abell Catalog. All of which were observed by
   Einstein. The spectral informations of luminous clusters were obtained
   by ASCA and Ginga observations. It is important to observe less
   luminous clusters with similar galaxy counts in relation with the
   formation and evolution of clusters. The comparison of temperature and
   abundance between them gives a clues to investigate the cluster
   merging.
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