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Struve

(Encyclopedia)Struve shtro͞oˈvə [key], family of astronomers. Friedrich Georg Wilhelm von Struve, 1793–1864, was born in Germany but later lived in Russia. While director (1817–39) of Dorpat Observatory he w...

Calderón Hinojosa, Felipe de Jesús

(Encyclopedia)Calderón Hinojosa, Felipe de Jesús fālēˈpā dā hāso͞osˈ käldārōnˈ ēˌnōhōˈsä [key], 1962–, Mexican politician, president of Mexico (2006–2012). His father, Luis Calderón Vega, h...

Zeeman effect

(Encyclopedia)Zeeman effect, splitting of a single spectral line (see spectrum) into a group of closely spaced lines when the substance producing the single line is subjected to a uniform magnetic field. The effect...

Bernoulli's principle

(Encyclopedia)CE5 Bernoulli's principle Bernoulli's principle, physical principle formulated by Daniel Bernoulli that states that as the speed of a moving fluid (liquid or gas) increases, the pressure within th...

Borah, William Edgar

(Encyclopedia)Borah, William Edgar bôrˈə [key], 1865–1940, U.S. Senator (1907–40), b. near Fairfield, Ill. Admitted to the bar in Kansas in 1887, after 1890 he became prominent in law and politics at Boise, ...

slavery

(Encyclopedia)slavery, historicially, an institution based on a relationship of dominance and submission, whereby one person owns another and can exact from that person labor or other services. Slavery has been fou...

international law

(Encyclopedia)international law, body of rules considered legally binding in the relations between national states, also known as the law of nations. It is sometimes called public international law in contrast to p...

land use

(Encyclopedia)land use, exploitation of land for agricultural, industrial, residential, recreational, or other purposes. Because the United States historically has a laissez-faire attitude toward land use, the land...

Mary I, 1516–58, queen of England

(Encyclopedia)Mary I (Mary Tudor), 1516–58, queen of England (1553–58), daughter of Henry VIII and Katharine of Aragón. During the spread of Protestantism in the reign of her half-brother, Edward VI, Mary w...

Babylonia

(Encyclopedia)Babylonia băbĭlōˈnēə [key], ancient empire of Mesopotamia. The name is sometimes given to the whole civilization of S Mesopotamia, including the states established by the city rulers of Lagash, ...