A Symposium on Electrical Contacts was held by The Institute of Physics and The Physical Society, in collaboration with The Institution of Electrical Engineers on the 5th, 6th and 7th April 1961, at the Brunel College of Technology. The scope of the discussion was such as to be of interest to physicists, electrical engineers, metal-lurgists and chemists from industry and industrial research establishments, from research associations and from universities. The opening session consisted of an address by Professor F. Llewellyn Jones on `The physics of electrical contact phenomena', in which the surveyed the various aspects of contact operation, the important problems still outstanding and the methods by which they are now being attacked. The sessions which followed were devoted to `Principles', `Fundamental investigations and techniques', `Contact surfaces', `Materials and design', `Non-metallic contacts' and `Miscellaneous subjects'. At each of these sessions, four or five short papers were presented and followed by discussion.
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M R Hopkins (1961) studied this question.