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Pestalozzi, Johann Heinrich
(Encyclopedia)Pestalozzi, Johann Heinrich yōˈhän hīnˈrĭkh pĕsˌtälôtˈsē [key], 1746–1827, Swiss educational reformer, b. Zürich. His theories laid the foundation of modern elementary education. He stu...Iran hostage crisis
(Encyclopedia)Iran hostage crisis, in U.S. history, events following the seizure of the American embassy in Tehran by Iranian students on Nov. 4, 1979. The overthrow of Muhammad Reza Shah Pahlevi of Iran by an Isla...cryptography
(Encyclopedia)cryptography krĭptŏgˈrəfē [key] [Gr.,=hidden writing], science of secret writing. There are many devices by which a message can be concealed from the casual reader, e.g., invisible writing, but t...Campania
(Encyclopedia)Campania kämpäˈnyä [key], region, 5,249 sq mi (13,595 sq km), central Italy, extending from ...advertising
(Encyclopedia)advertising, in general, any openly sponsored offering of goods, services, or ideas through any medium of public communication. At its inception advertising was merely an announcement; for example, en...airship
(Encyclopedia)airship, an aircraft that consists of a cigar-shaped gas bag, or envelope, filled with a lighter-than-air gas to provide lift, a propulsion system, a steering mechanism, and a gondola accommodating pa...planetarium
(Encyclopedia)planetarium, optical device used to project a representation of the heavens onto a domed ceiling; the term also designates the building that houses such a device. A modern planetarium consists of as m...Sephardim
(Encyclopedia)Sephardim səfärˈdəm [key], one of the two major geographic divisions of the Jewish people, consisting of those Jews whose forebears in the Middle Ages resided in the Iberian Peninsula, as distingu...Rawls, John Bordley
(Encyclopedia)Rawls, John Bordley, 1921–2002, American philosopher and political theorist, b. Baltimore, grad. Princeton (A.B., 1943; Ph.D., 1950). He taught at Princeton (1950–52), Cornell (1953–59), and the...land
(Encyclopedia)land, in law, any ground, soil, or earth regarded as the subject of ownership, including trees, water, buildings added by humans, the air above, and the earth below. Private ownership of land does not...Browse by Subject
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