secondary triangulation
41Timeline of historic inventions — The timeline of historic inventions is a chronological list of particularly important or significant technological inventions. Note: Dates for inventions are often controversial. Inventions are often invented by several inventors around the same… …
42Magnetometer — A magnetometer is a measuring instrument used to measure the strength or direction of a magnetic field either produced in the laboratory or existing in nature. Some countries such as the USA, Canada and Australia classify the more sensitive… …
43Scafell Pike — viewed from Wastwater Elevation 978 m (3,209 ft) …
44Leopard tank — Infobox Weapon|is vehicle=yes name=Leopard 1 caption=Leopard 1A3 at the Base Borden Military Museum. type=Main battle tank origin=West Germany length= 9.54/8.29 m (gun forward/rearward) width= 3.37 m height= 2.39/2.70 m (turret roof/absolute)… …
45Tiger I — Panzerkampfwagen Tiger Ausf. E Tiger I in Sicily in 1943 Type …
46Gravesend, Kent — Long Reach redirects here. For the neighbourhood in the eastern United States, see Long Reach, Columbia, Maryland. Coordinates: 51°26′29″N 0°22′07″E / 51.4415°N 0.3685°E …
47Abū Ishāq Ibrāhīm al-Zarqālī — Arzachel redirects here. For other uses, see Arzachel (disambiguation). Abū Isḥāq Ibrāhīm ibn Yaḥyā al Naqqāsh al Zarqālī, Al Zarqali, Ibn Zarqala (1029–1087), Latinized as Arzachel, was an instrument maker and one of the leading theoretical and… …
48Lisvane — infobox UK place country = Wales welsh name= Llys Faen constituency welsh assembly= Cardiff North latitude= 51.55 longitude= 3.16 official name= Lisvane unitary wales= Cardiff lieutenancy wales= Cardiff constituency westminster= Cardiff North… …
49Pirate radio in North America — CubaGovernment propaganda stationsSince the 1960s and the advent of the revolutionary government of Fidel Castro, the United States has engaged in a number of overt and covert political broadcasting operations intended to undermine the government …
50Barney Calhoun — General CVG character width=180px name=Barney Calhoun caption=Barney, from (l r) Half Life , with the High Definition Pack, and Half Life 2 . series= Half Life series firstgame= Half Life voiceactor=Michael Shapiro inuniverse=Barney Calhoun is a… …
