in Oxford Dictionary of National Biography
September 2004; p ublished online September 2004 .
Reference Entry. Subjects: Electrical Engineering; Mathematics; Education. 1550 words.
Perry, John (1850–1920), electrical engineer and mathematician, was born on 14 February 1850 at Garvagh, co. Londonderry, the second son of Samuel Perry and his Scottish-born wife. His...