Irish physicist, lecturer, and populariser of science. Studied in Marburg and Berlin, 1848–51. Professor of natural philosophy, Royal Institution of Great Britain, 1853–87; professor of natural philosophy, Royal School of Mines, 1859–68; superintendent of the Royal Institution, 1867–87. Scientific adviser to Trinity House and the Board of Trade, 1866–83. FRS 1852.
Sources: DSB ODNB. (See the bibliography for full references to sources)