Henry Hennessy (1826–1901)

Irish physicist and mathematician. Initially an engineer, became librarian at Queen’s College, Cork, in 1849. Professor of physics at the Roman Catholic University, Dublin, 1855. Professor of applied mathematics, Royal College of Science, Dublin, 1874; dean, 1880 and 1888. Specialised in meteorology, climatology, and terrestrial physics. FRS 1858.