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Eisenach

(Encyclopedia)Eisenach īˈzənäkh [key], city, Thuringia, central Germany. It is an industrial center and ...

Deane, Silas

(Encyclopedia)Deane, Silas, 1737–89, political leader and diplomat in the American Revolution, b. Groton, Conn. A lawyer and merchant at Wethersfield, Conn., he was elected (1772) to the state assembly and became...

Menger, Carl

(Encyclopedia)Menger, Carl kärl mĕngˈər [key], 1840–1921, Austrian economist, a founder of the Austrian school of economics. He was professor of economics at the Univ. of Vienna from 1873 until 1903, when he ...

Riemann, Bernhard

(Encyclopedia)Riemann, Bernhard (Georg Friedrich Bernhard Riemann) gāˈôrk frēˈdrĭkh bĕrnˈhärt rēˈmän [key], 1826–66, German mathematician. He studied at the universities of Göttingen and Berlin and w...

X-ray crystallography

(Encyclopedia)X-ray crystallography, the study of crystal structures through X-ray diffraction techniques. When an X-ray beam bombards a crystalline lattice in a given orientation, the beam is scattered in a defini...

Courland

(Encyclopedia)Courland or Kurland both: kûrˈlănd, Ger. ko͞orˈlänt [key], Latvian Kurzeme, historic region and former duchy, in Latvia, between the Baltic Sea and the Western Dvina River. It is an agricultural...

Sickingen, Franz von

(Encyclopedia)Sickingen, Franz von fränts fən zĭˈkĭngən [key], 1481–1523, German knight. Placed under the ban of the Holy Roman Empire because of his profitable forays along the Rhine, he served King Franci...

operetta

(Encyclopedia)operetta ŏpərĕtˈə [key], type of light opera with a frivolous, sentimental story, often employing parody and satire and containing both spoken dialogue and much light, pleasant music. In the earl...

Bolyai

(Encyclopedia)Bolyai bōˈlyoi [key], family of Hungarian mathematicians. The father, Farkas, or Wolfgang, Bolyai, 1775–1856, b. Bolya, Transylvania, was educated in Nagyszeben from 1781 to 1796 and studied in Ge...

geopolitics

(Encyclopedia)geopolitics, method of political analysis, popular in Central Europe during the first half of the 20th cent., that emphasized the role played by geography in international relations. Geopolitical theo...