******************************************************
   PR # 12161
    We propose to observe 3 distant, rich, X-ray luminous clusters of
    galaxies, first detected in the Einstein EMSS, which we have studied
    extensively in the visible b Our  brightest  target is  Cl1358+62
    (z=0.33). Our  Asca spectrum, containing meaningful measurement of Fe
    abundance. We also propose to observe Cl0303+1658 and Cl0302+1717,
    which are only 19 arcmin apart on the sky.  Our optical data show
    these clusters to have identical redshifts,(0.425+-0.001) and suggest
    that they are bound to one another. Two overlapping Asca pointings
    will measure the temperature of each cluster,constrain Fe abundance,
    and allow us to search for X-ray emission in the space be


 ******************************************************