Born at Dewsbury, Yorkshire, the second child and second son of Benjamin Hepworth, woollen manufacturer, and his wife, *née* Haley. He was educated at the Wheelwright Grammar School, Dewsbury, and won a scholarship at St John's College, Cambridge, where he took first-class honours in the Natural Sci

Born 18 June 1878 at Saltair, Yorkshire, only son, with one sister, of Arthur Mason Worthington (1852-1916), FRS, then head master of the Salt Schools, Shipley, and afterwards professor of physics successively at HM Dockyard School, Portsmouth, the Royal Naval Engineering College, Devonport, and the