1839 - started work on the Irish Ordnance Survey. 1842 - transferred to English Ordnance Survey. 1843 - dismissed for dissent over working conditions for Irish workers. 1848–1851 - studied mathematics and physics in Marburg and Berlin. 1851 - met Thomas Huxley. 1864 - with others, formed the X Club, a pressure group involved in improving scientific organisation. 1868 - publication of Faraday as a Discoverer. 1867 - succeeded Faraday as Superintendent of the Royal Institution. 1877 - perfected pasteurization