MPX5063627: Northern Ireland August 1969. Chief of staff General Sir Geoffrey Baker seen here touring Londonderry talking to his troops. / Bridgeman Images

UIS5063644: Charles Babbage, English pioneer of machine computing, 1840 / Bridgeman Images

MPX5063656: British army Soldiers seen here on patrol in the Falls Road area of Belfast, Northern Ireland. / Bridgeman Images

UIS5063658: A family group, c 1845 / Bridgeman Images

UIS5063659: Watches, Pocket Balance spring pocket watch in silver case, 1675-1679 / Bridgeman Images

UIS5063664: Watches, Pocket Balance spring pocket watch in silver case, 1675-1679 / Bridgeman Images

MPX5063675: Policeman wearing gas masks and shields prepare a baton charge at during the Londonderry riots in Northern Ireland. August 1969 / Bridgeman Images

UIS5063677: William Henry Fox Talbot, pioneer photograper, 1860s / Bridgeman Images

UIS5063678: William Henry Fox Talbot, pioneer photograper, 1860s / Bridgeman Images

UIS5063680: William Henry Fox Talbot, photographic inventor, mid-19th century / Bridgeman Images

MPX5063681: Policeman wearing gas masks and shields prepare a baton charge at during the Londonderry riots in Northern Ireland. August 1969 / Bridgeman Images

MPX5063683: Policeman wearing gas masks and shields prepare a baton charge at during the Londonderry riots in Northern Ireland. August 1969 / Bridgeman Images

MPX5063693: Policeman wearing gas masks and shields prepare a baton charge at during the Londonderry riots in Northern Ireland. August 1969 / Bridgeman Images

MPX5063702: Northern Ireland September 1971, Rioting in Londonderry where soldiers of the Anglian regiment came under attack from Catholic rioters. The army and police made several arrests. Our picture shows: Rioters running away from police and army units September 1971 71-10379-008 / Bridgeman Images

MPX5063712: Soldiers carry out a search for weapons and explosives at the army check point at Buncrana border crossing, Northern Ireland. July 1970 70-7160-001 / Bridgeman Images

UIS5063717: Premier vehicule a vapeur utilise aux Etats Unis par les pompiers pour eteindre les incendies / Bridgeman Images

UIS5063725: Henry Cavendish, English chemist, 18th century / Bridgeman Images

UIS5063727: Henry Coxwell, English balloonist, c 1886 / Bridgeman Images

MPX5063729: Policeman wearing gas masks and shields prepare a baton charge at during the Londonderry riots in Northern Ireland. August 1969 / Bridgeman Images

UIS5063731: Carron electric cooker, c 1912 / Bridgeman Images

MPX5063735: A refugee centre in Belfast, Northern Ireland, where residents fleeing the troubles can get a hot meal, seek medical advice and a bed. / Bridgeman Images

UIS5063740: Arable Farming, Harvesting Equipment Bell's Reaper (faucheuse), 1827-1828 / Bridgeman Images

MPX5063742: A refugee centre in Belfast, Northern Ireland, where residents fleeing the troubles can get a hot meal, seek medical advice and a bed. / Bridgeman Images

UIS5063745: Arable Farming, Harvesting Equipment Bell's Reaper (faucheuse), 1827-1828 / Bridgeman Images

MPX5063751: Some of the backbreaking equipment women would use on washing days in days gone by on show at Beamish Museum. For example the poss tub, poss sticks anda large mangle / Bridgeman Images

UIS5063753: Arable Farming, Ploughing Equipment Usher's steam plough (charrue), 1849 / Bridgeman Images

MPX5063762: Rioting in Londonderry, Northern Ireland breaks out again. With the police being stoned, members of the British army appear on the streets. / Bridgeman Images

UIS5063770: Arable Farming, Ploughing Equipment Moline motor plough (charrue a moteur), c 1917 / Bridgeman Images

MPX5063771: The burnt out remains of a Catholic Cottage which was fire bombed, Northern Ireland. / Bridgeman Images

MPX5063775: Soldiers of the Black Watch on patrol in Londonderry Our picture shows Humber Amoured Personnel Carrier . July 1972 72-7408-001 / Bridgeman Images

MPX5063783: Northern Ireland March 1972. Police, army and fire service attend the scene of the Abercorn bombing in Belfast. March 1972 72-7566-002 / Bridgeman Images

MPX5063786: Northern Ireland July 1972. General scenes of devastation following a series of bomb blasts in Belfast city centre. July 1972 72-7554-002 / Bridgeman Images

UIS5063788: Arable Farming, Ploughing Equipment Crawley motor plough (charrue), 1919 / Bridgeman Images

MPX5063790: Slogans painted on horses and lamp post call for peace following the violence at Londonderry's Apprentice Boys parade, Northern Ireland. / Bridgeman Images

UIS5063798: Farm Equipment, Tractors John Deere tractor, GW model, 1948 / Bridgeman Images

UIS5063799: Farm Equipment, Tractors International Harvester 10/20 tractor, 1925 / Bridgeman Images