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Published online by Cambridge University Press: 26 July 2016
The galaxies of the Virgo cluster have been observed extensively as members of one of the nearest moderately rich cluster. In view of the proximity of cluster members one to another, it might be expected that a significant fraction would be seen to be interacting with their neighbours, but simple inspection of deep plates of the cluster suggests otherwise. It is the intention in this note to show that a much higher number of apparent optical pairs are in fact involved in interactions but that this does not become apparent until special techniques are applied to reveal the faintest features on already deep photographs.