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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...

Petermann, August Heinrich

(Encyclopedia)Petermann, August Heinrich ouˈgo͝ost hīnˈrĭkh pāˈtərmän [key], 1822–78, German geographer, an authority on the geography of Africa and the Arctic. He had (1847–54) a cartographical establ...

Hertwig, Oscar

(Encyclopedia)Hertwig, Oscar ôsˈkär hĕrtˈvĭkh [key], 1849–1922, German embryologist. He studied medicine with Haeckel and Gegenbaur. In 1875 he established the fact that fertilization consists of the union ...

Chladni, Ernst Florens Friedrich

(Encyclopedia)Chladni, Ernst Florens Friedrich ĕrnst flōˈrĕns frēˈdrĭkh klädˈnē [key], 1756–1827, German physicist. An authority on acoustics, he made studies of the transmission of sound in various gas...

Hoffmann, Ernst Theodor Amadeus

(Encyclopedia)Hoffmann, Ernst Theodor Amadeus ĕrnst tāˈōdōr ämädāˈo͝os hôfˈmän [key], 1776–1822, German romantic novelist and composer, a lawyer. At one time an opera composer and musical director at...

Mansfeld, Peter Ernst von

(Encyclopedia)Mansfeld, Peter Ernst von pāˈtər ĕrnst fən mänsˈfĕlt [key], 1580?–1626, military commander in the Thirty Years War. Illegitimate son of a governor for the Hapsburgs in Luxembourg, he rendere...

Baer, Karl Ernst von

(Encyclopedia)Baer, Karl Ernst von, 1792–1876, Estonian biologist. He was a professor at Würzburg and Königsberg and from 1834 at St. Petersburg. Considered a founder of modern embryology, he discovered the not...

Biren, Ernst Johann von

(Encyclopedia)Biren, Ernst Johann von: see Biron. ...

Biron, Ernst Johann von

(Encyclopedia)Biron or Biren, Ernst Johann von ĕrnst yōhänˈ fən bēˈrôn, bēˈrən [key], 1690–1772, duke of Courland (1737–43, 1763–69), favorite of Czarina Anna of Russia. A Baltic nobleman, he rose ...

Bernstorff, Johann Hartwig Ernst

(Encyclopedia)Bernstorff, Johann Hartwig Ernst bĕrnsˈtôrf [key], 1712–72, Danish politician, of German (Hanoverian) origin. As minister of foreign affairs (1751–70) under Frederick V and Christian VII, he s...