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Rydberg, Johannes Robert

(Encyclopedia)Rydberg, Johannes Robert yo͞oˈhänəs rôˈbərt rüdˈbĕryə [key], 1854–1919, Swedish physicist. Rydberg was a professor at Lund from 1901 to 1919. He is best known for his grouping of the freq...

Sacrobosco, Johannes de

(Encyclopedia)Sacrobosco, Johannes de yōhänˈəs də săkrōbŏsˈkō [key], or John of Hollywood, c.1200–1256, English mathematician and astronomer. He wrote several widely read and influential books: Algorism...

Purkinje, Johannes Evangelista

(Encyclopedia)Purkinje, Johannes Evangelista yōhänˈəs āˌväng-gālĭsˈtä po͝orˈkĭnyā [key], 1787–1869, Czech physiologist. While professor (1823–50) at the Univ. of Breslau he pioneered in establish...

Potgieter, Everhardus Johannes

(Encyclopedia)Potgieter, Everhardus Johannes āvərhärˈdəs yōhänˈəs pôtˈgētər [key], 1808–75, Dutch critic, essayist, and poet. He was the first editor (1837–65) of and a major contributor to De Gids...

Eichler, August Wilhelm

(Encyclopedia)Eichler, August Wilhelm ouˈgo͝ost vĭlˈhĕlm īkhˈlər [key], 1839–87, German botanist. He worked out the symmetry of the parts of a flower and developed a system of plant classification which, ...

Drobisch, Moritz Wilhelm

(Encyclopedia)Drobisch, Moritz Wilhelm mōˈrĭts vĭlˈhĕlm drōˈbĭsh [key], 1802–96, German philosopher and mathematician. He was a teacher at Leipzig and a follower and adherent of Johann Friedrich Herbart....

Goering, Hermann Wilhelm

(Encyclopedia)Goering or Göring, Hermann Wilhelm both: hĕrˈmän vĭlˈhĕlm göˈrĭng [key], 1893–1946, German National Socialist leader. In World War I he was a hero of the German air force. An early member ...

Giesebrecht, Wilhelm von

(Encyclopedia)Giesebrecht, Wilhelm von vĭlˈhĕlm fən gēˈzəbrĕkht [key], 1814–89, German historian. A gifted student of Ranke, he later taught at the Univ. of Königsberg. His Geschichte der deutschen Kaise...

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