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John Perry
1850 - 1920
John Perry (1850–1920) was an Irish electrical engineer and mathematician
Graeme J. N. Gooday, ‘Perry, John (1850–1920)’, Oxford Dictionary of National Biography, Oxford University Press, 2004; online edn, Oct 2009 [http://www.oxforddnb.com/view/article/39459, accessed 13 May 2015]