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Walker, William

(Encyclopedia)Walker, William, 1824–60, American filibuster in Nicaragua, b. Nashville, Tenn. Walker, a qualified doctor, a lawyer, and a journalist by the time he was 24, sought a more adventurous career. After ...

boiler

(Encyclopedia)boiler, device for generating steam. It consists of two principal parts: the furnace, which provides heat, usually by burning a fuel, and the boiler proper, a device in which the heat changes water in...

Yüan

(Encyclopedia)Yüan yüän [key], Mongol dynasty of China that ruled from 1271 to 1368. It was a division of the great empire conquered by the Mongols. Kublai Khan, who adopted the Chinese dynastic name Yüan in 12...

Maduro Moros, Nicolás

(Encyclopedia)Maduro Moros, Nicolás nēkōläsˈ mädo͞oˈrō mōˈrōs [key], 1962–, Venezuelan trade union and political leader. He was trained as a union organizer in Cuba, and later became a leader in an un...

circle

(Encyclopedia)CE5 Circle circle, closed plane curve consisting of all points at a given distance from some fixed point, called the center. A circle is a conic section cut by a plane perpendicular to the axis of...

Sung

(Encyclopedia)Sung so͝ong [key], dynasty of China that ruled 960–1279. It was divided into two periods: Northern Sung (907–1126) with its capital at Kaifeng and Southern Sung (1127–1279) with its capital at ...

Cook, James

(Encyclopedia)Cook, James, 1728–79, English explorer and navigator. The son of a Yorkshire agricultural laborer, he had little formal education. After an apprenticeship to a firm of shipowners at Whitby, he joine...

ferry

(Encyclopedia)ferry, vessel providing passage over a river, lake, or other body of water for passengers, vehicles, or freight; the term is also applied to the place where the crossing is made and, by extension, to ...

Hay-Pauncefote Treaties

(Encyclopedia)Hay-Pauncefote Treaties hā-pônsˈfo͝ot [key], negotiated in 1899 and 1901 by Secretary of State John Hay, for the United States, and Lord Pauncefote of Preston, British ambassador to the United Sta...

Addis Ababa

(Encyclopedia)Addis Ababa ădˈĭs ăbˈəbə [key] [Amharic,=new flower], city (2021 metro. area pop. 5,005,524), capital of Ethiopia. It is situated at c.8,000 ft (2,440 m) on a well-...