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(Encyclopedia)bibliography. The listing of books is of ancient origin. Lists of clay tablets have been found at Nineveh and elsewhere; the library at Alexandria had subject lists of its books. Modern bibliography b...tunnel
(Encyclopedia)tunnel, underground passage usually made without removing the overlying rock or soil. Although tunnels are approximately horizontal, they must be built with sufficient gradient for proper drainage. Tu...Channel Tunnel
(Encyclopedia)Channel Tunnel, popularly called the “Chunnel,” a three-tunnel railroad connection running under the English Channel, connecting Folkestone, England, and Calais, France. The tunnels are 31 mi (50 ...Saint Gotthard, mountain group, Switzerland
(Encyclopedia)Saint Gotthard sānt gŏtˈhərd, gŏtˈərd [key], mountain group of the Lepontine Alps, S central Switzerland, rising to Pizzo Rotondo (10,472 ft/3,192 m high). The Reuss, Rhine, Ticino, and Rhône ...Mersey
(Encyclopedia)Mersey mûrˈzē [key], river, c.70 mi (110 km) long, formed at Stockport, W England, by the confluence of the Etherow and Goyt rivers. It flows east to the Irish Sea near Liverpool. The estuary of th...Lötschberg Railway
(Encyclopedia)Lötschberg Railway löchˈbĕrkh [key], electrical railroad, crossing the Bernese Alps from Thun, W central Switzerland, to Brig, on the Rhône River, S Switzerland. It passes through the Lötschberg...Cenis, Mont
(Encyclopedia)Cenis, Mont môN sənēˈ [key], Ital. Moncenisio, Alpine pass, 6,831 ft (2,082 m) high, on the French-Italian border. It is one of the great invasion routes in Italian history. Napoleon I built a new...wind tunnel
(Encyclopedia)wind tunnel, apparatus for studying the interaction between a solid body and an airstream. A wind tunnel simulates the conditions of an aircraft in flight by causing a high-speed stream of air to flow...Chesapeake Bay Bridge-Tunnel
(Encyclopedia)Chesapeake Bay Bridge-Tunnel, officially the Lucius J. Kellam, Jr. Bridge-Tunnel, 17.6 mi (28.2 km) long, across the mouth of Chesapeake Bay, E Va., connecting Cape Charles with Norfolk, Va. Opened in...Moffat Tunnel
(Encyclopedia)Moffat Tunnel mŏfˈət [key], railroad tube, 24 ft (7.3 m) high, 18 ft (5.5 m) wide, and 6.4 mi (10.3 km) long, N central Colo., in the Continental Divide, NW of Denver. One of the country's longest ...Browse by Subject
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