Columbia Encyclopedia

Search results

500 results found

Natta, Giulio

(Encyclopedia)Natta, Giulio, 1903–79, Italian chemist, Ph.D. the Polytechnic of Milan, 1924. Natta held brief appointments at several academic institutions, including the Univ. of Pavia (1933–35), the Univ. of ...

Welsbach mantle

(Encyclopedia)Welsbach mantle or Welsbach burner [for C. A. von Welsbach], cylindrical framework of gauze impregnated with oxides of thorium and cerium. When heated in a gas flame, it produces a very bright light b...

Sturm und Drang

(Encyclopedia)Sturm und Drang shto͝orm o͝ont dräng [key] or Storm and Stress, movement in German literature that flourished from c.1770 to c.1784. It takes its name from a play by F. M. von Klinger, Wirrwarr; od...

Heinse, Wilhelm

(Encyclopedia)Heinse, Wilhelm vĭlˈhĕlm hīnˈsə [key], 1746–1803, German novelist. His principal novels, Ardinghello; or, An Artist's Rambles in Sicily (1787, tr. 1839) and Hildegard von Hohenthal (1795–96)...

Pfeffer, Wilhelm

(Encyclopedia)Pfeffer, Wilhelm vĭlˈhĕlm pfĕˈfər [key], 1845–1920, German plant physiologist. He was professor of botany successively at the universities of Bonn, Basel, Tübingen, and Leipzig (from 1887). W...

Carstens, Asmus Jacob

(Encyclopedia)Carstens, Asmus Jacob äsˈmo͝os yäˈkôp kärˈstəns [key], 1754–98, German historical painter and engraver, b. Schleswig. He studied in Copenhagen and in Italy. He was influenced by the work of...

serial music

(Encyclopedia)serial music, the body of compositions whose fundamental syntactical reference is a particular ordering (called series or row) of the twelve pitch classes—C, C#, D, D#, E, F, F#, G, G#, A, A#, B—t...

games, theory of

(Encyclopedia)games, theory of, group of mathematical theories first developed by John Von Neumann and Oskar Morgenstern. A game consists of a set of rules governing a competitive situation in which from two to n i...

Mackinder, Sir Halford John

(Encyclopedia)Mackinder, Sir Halford John hălˈfərd, məkĭnˈdər [key], 1861–1947, English geopolitician. Educated at Oxford (1887–1905), he led in the revival of British geographical learning. He establish...

dialectic

(Encyclopedia)dialectic dīəlĕkˈtĭk [key] [Gr.,= art of conversation], in philosophy, term originally applied to the method of philosophizing by means of question and answer employed by certain ancient philosop...