****************************************************** PR # 42183 We propose two x-ray bright clusters with apparently on-going mergers for detailed study with ASCA. With these observations, we can estimate the total mass and heavy element distribution of the subclusters comprising each cluster and examine subcluster interactions in the form of shocks which are expected to occur as the subclusters merge. The ASCA observations, when combined with extensive optical spectroscopy and ROSAT images, provide powerful tools for investigating cluster dynamics and mergers. ******************************************************