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Leibniz, Gottfried Wilhelm, Baron von

(Encyclopedia)Leibniz or Leibnitz, Gottfried Wilhelm, Baron von both: gôtˈfrēt vĭlˈhĕlm bärônˈ fan līpˈnĭts [key], 1646–1716, German philosopher and mathematician, b. Leipzig. Although known primarily...

ammonia

(Encyclopedia)ammonia, chemical compound, NH3, colorless gas that is about one half as dense as air at ordinary temperatures and pressures. It has a characteristic pungent, penetrating odor. Ammonia forms a minute ...

Gould, Glenn

(Encyclopedia)Gould, Glenn, 1932–82, Canadian pianist and composer. A prodigy, he began study at the Royal Conservatory of Music in Toronto at 12. He was piano soloist with the Toronto Symphony at 14, and by the ...

Grimm, Jakob

(Encyclopedia)Grimm, Jakob grĭm [key], 1786–1859, and which did much to encourage the romantic revival of folklore. Among their best-known stories are “Hansel and Gretel,” “Rapunzel,” “The Breman Town...

Hahn, Otto

(Encyclopedia)Hahn, Otto ôˈtō hän [key], 1879–1968, German chemist and physicist. His important contributions in the field of radioactivity include the discovery of several radioactive substances, the develop...

Mendel, David

(Encyclopedia)Mendel, David: see Neander, Johann August Wilhelm. ...

Struve

(Encyclopedia)Struve shtro͞oˈvə [key], family of astronomers. Friedrich Georg Wilhelm von Struve, 1793–1864, was born in Germany but later lived in Russia. While director (1817–39) of Dorpat Observatory he w...

Book of Changes

(Encyclopedia)Book of Changes or I Ching ē jĭng, ē chĭng [key], ancient Chinese book of prophecy and wisdom. The oldest parts of its text are thought to have attained their present form in the century before Co...

monad

(Encyclopedia)monad: see Bruno, Giordano; Leibniz, Gottfried Wilhelm, Baron von. ...

Grossbeeren

(Encyclopedia)Grossbeeren grōsbārˈən [key], village, Brandenburg, E Germany. There, in 1813, Friedrich Wilhelm von Bülow, using the Prussian militia for the first time, defeated the French under Oudinot, thus ...