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Hagen, Johannes Georg

(Encyclopedia)Hagen, Johannes Georg yōhäˈnəs gāˈôrk häˈgən [key], 1847–1930, American astronomer and mathematician, b. Austria. A Jesuit, he came in 1880 to the United States to teach. In 1888 he was ma...

Geiger, Johannes Wilhelm

(Encyclopedia)Geiger, Johannes Wilhelm (Hans Geiger) gīˈgər [key], 1882–1945, German physicist. Geiger received a doctorate in physics at Erlangen in 1906, then went to Manchester, where he assisted British c...

Jørgensen, Jens Johannes

(Encyclopedia)Jørgensen, Jens Johannes yĕns yōhäˈnəs yörˈgənsən [key], 1866–1956, Danish poet and religious writer. He reacted against the naturalism of Georg Brandes and, in such works as Poems (1898),...

Jensen, Johannes Vilhelm

(Encyclopedia)Jensen, Johannes Vilhelm yōhänˈəs vĭlˈhĕlm yĕnˈsən [key], 1873–1950, Danish writer. As a young man he studied medicine; his interest in biology and anthropology is obvious throughout his w...

Johannes von Saaz

(Encyclopedia)Johannes von Saaz (Johannes von Tepl) yōhänˈəs fən zäts, tĕpˈəl [key], c.1350–c.1414, Bohemian humanist and writer. Johannes is best known for his powerful work Der Ackermann aus Böhmen (c...

Johannes von Tepl

(Encyclopedia)Johannes von Tepl: see Johannes von Saaz. ...

Müller, Johannes Peter

(Encyclopedia)Müller, Johannes Peter mŭlˈər [key], 1801–58, German physiologist and anatomist. From 1833 until the end of his career he was professor at Berlin. He was famed as a teacher; for his extensive r...

Müller, Johannes von

(Encyclopedia)Müller, Johannes von yōhäˈnəs fən mülˈər [key], 1752–1809, Swiss historian. He spent much of his life in Germany, where he held political posts under the elector of Mainz, the king of Pruss...

Witteveen, H. Johannes

(Encyclopedia)Witteveen, H. Johannes (Hendrikus Johannes Witteveen), 1921–2019, Dutch economist and political leader. After receiving his doctorate from the Netherlands School of Economics (now Erasmus Univ. Rott...

Wolf, Markus Johannes

(Encyclopedia)Wolf, Markus Johannes vôlf [key], 1923–2006, East German spymaster. A legendary cold-war espionage chief, he was called “the man without a face” because until 1978 there was no known photograp...