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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...

Warburg, Otto Heinrich

(Encyclopedia)Warburg, Otto Heinrich ŏtˈō hīnˈrĭkh värˈbo͝orkh [key], 1883–1970, German physiologist. He was director (1931–53) of the Kaiser Wilhelm Institute (now Max Planck Institute) for cell physi...

Weber, Ernst Heinrich

(Encyclopedia)Weber, Ernst Heinrich vāˈbər [key], 1795–1878, German physiologist. He was a professor at the Univ. of Leipzig (1821–71) and is known for his work on touch and for the formulation of Weber's l...

Humboldt, Alexander, Freiherr von

(Encyclopedia)Humboldt, Alexander, Freiherr von hŭmˈbōlt, Ger. älĕksänˈdər frīˈhĕr fən ho͝omˈbôlt [key], 1769–1859, German naturalist, inventor, explorer, and author, the most eminent scientist of ...

Holbach, Paul Henri Thiry, baron d'

(Encyclopedia)Holbach, Paul Henri Thiry, baron d' poulˈ hīnˈrĭkh dētrĭkh bärōnˈ fŭn hôlˈbäkh [key], 1723–89, French philosopher, one of the Encyclopedists. Although a native of the Palatinate, he liv...

Kayser, Heinrich Gustav Johannes

(Encyclopedia)Kayser, Heinrich Gustav Johannes hīnˈrĭkh go͝osˈtäf yōhänˈəs kīˈzər [key], 1853–1940, German physicist. He was professor at Bonn from 1894 to 1920. He is known for his work in sound and...

De Bary, Heinrich Anton

(Encyclopedia)De Bary, Heinrich Anton hīnˈrĭkh änˈtōn də bärēˈ [key], 1831–88, German botanist. He was professor at the universities of Freiburg in Breisgau (1855–66) and Halle (1867–72) and first r...

Tischbein, Johann Heinrich Wilhelm

(Encyclopedia)Tischbein, Johann Heinrich Wilhelm yōˈhän hīnˈrĭkh vĭlˈhĕlm tĭshˈbīn [key], 1751–1829, German classical painter and etcher. He was a popular portrait painter of the German royalty. He al...

Olbers, Heinrich Wilhelm Matthäus

(Encyclopedia)Olbers, Heinrich Wilhelm Matthäus hīnˈrĭkh vĭlˈhĕlm mätĕˈo͝os ôlˈbərs [key], 1758–1840, German astronomer and physician. He originated (1797) the first satisfactory method for calculat...

Wagner, Adolf Heinrich Gotthilf

(Encyclopedia)Wagner, Adolf Heinrich Gotthilf äˈdôlf hīnˈrĭkh gôtˈhĭlf vägˈnər [key], 1835–1917, German economist and socialist, studied at Göttingen and Heidelberg. He taught economics at several un...