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Ruska, Ernst

(Encyclopedia)Ruska, Ernst, 1906–88, German electrical engineer. By applying the discovery that electron waves are 100,000 times shorter than those of light, Ruska built a microscope that used a beam of electrons...

Hofstadter, Robert

(Encyclopedia)Hofstadter, Robert, 1915–90, American physicist, b. New York City, Ph.D. Princeton, 1938. He taught at Princeton from 1938 to 1950 and also worked at the National Bureau of Standards during World Wa...

Steffen, Albert

(Encyclopedia)Steffen, Albert älˈbĕrt shtĕfˈən [key], 1884–1963, Swiss novelist, poet, and playwright, who wrote in German. His works are concerned with the martyrdom and redemption of Christ. To Steffen th...

minnesinger

(Encyclopedia)minnesinger mĭnˈĭsĭngˌər [key], a medieval German knight, poet, and singer of Minne, or courtly love. Originally imitators of Provençal troubadours, minnesingers developed their own style in th...

Bernadotte, Count Folke

(Encyclopedia)Bernadotte, Count Folke fôlˈkə bĕrnädôtˈ, bûrˈnədŏt [key], 1895–1948, Swedish internationalist; nephew of King Gustavus V. He was active in the Swedish Red Cross and became its president ...

Cohnheim, Julius

(Encyclopedia)Cohnheim, Julius yo͞oˈlyo͝os kōnˈhīm [key], 1839–84, German experimental histologist and pathologist. In a relatively brief life Cohnheim made a series of remarkable contributions to the rapid...

gamma radiation

(Encyclopedia)gamma radiation, high-energy photons emitted as one of the three types of radiation resulting from natural radioactivity. It is the most energetic form of electromagnetic radiation, with a very short ...

Greenberg, Clement

(Encyclopedia)Greenberg, Clement, 1909–94, American art critic, b. New York City. Greenberg's criticism was primarily concerned with art produced after abstract expressionism. This art, now known as color-field p...

Keller, Gottfried

(Encyclopedia)Keller, Gottfried gôtˈfrēt [key], 1819–90, Swiss novelist, poet, and short-story writer. His vital, realistic, and purposeful fiction gives him a high place among 19th-century authors. Chief amon...

Fallada, Hans

(Encyclopedia)Fallada, Hans ro͞oˈdôlf dĭtˈsən [key], 1893–1947, German novelist. Little Man, What Now? (1932, tr. 1933), his story of a young couple in Germany after World War I, was an immediate internatio...