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Schimper, Karl Friedric

(Encyclopedia)Schimper, Karl Friedric shĭmˈpər [key], 1803–67, German botanist. He did important work in plant morphology and originated the theory, called phyllotaxis, that there is a fixed order to the arran...

glacial periods

(Encyclopedia)glacial periods, times during which large portions of the earth's surface were covered with thick glacial ice sheets. In the Pleistocene epoch, in the Carboniferous and Permian periods of the Paleozoi...

Mill, John Stuart

(Encyclopedia)Mill, John Stuart, 1806–73, British philosopher and economist. A precocious child, he was educated privately by his father, James Mill. In 1823, abandoning the study of law, he became a clerk in the...

charter

(Encyclopedia)charter, document granting certain rights, powers, or functions. It may be issued by the sovereign body of a state to a local governing body, university, or other corporation or by the constituted aut...

Heckscher, Eli Filip

(Encyclopedia)Heckscher, Eli Filip ĕˈlē fĭlˈĭp hĕkˈshər [key], 1879–1952, Swedish economic historian. Influenced by the neoclassical economics of Alfred Marshall, Heckscher advocated the use of monetary ...

Herschbach, Dudley Robert

(Encyclopedia)Herschbach, Dudley Robert hûrshˈbăk [key], 1932–, American chemist, b. San Jose, Calif., Ph.D. Harvard, 1958. In 1986, Herschbach shared the Nobel Prize in Chemistry with Yuan T. Lee and John C. ...

Hess, Moses

(Encyclopedia)Hess, Moses, 1812–75, German socialist. He was responsible for converting Engels to Communism, and he early introduced Marx to social and economic problems. Hess played a prominent role in transform...

Mun, Thomas

(Encyclopedia)Mun, Thomas mŭn [key], 1571–1641, English writer on economics. A merchant in Italy and the Levant, he became (1615) a director in the East India Company. In his Discourse of Trade from England unto...

nominalism

(Encyclopedia)nominalism, in philosophy, a theory of the relation between universals and particulars. Nominalism gained its name in the Middle Ages, when it was contrasted with realism. The problem arises because i...

Oort, Jan Hendrik

(Encyclopedia)Oort, Jan Hendrik ōrt [key], 1900–1992, Dutch astronomer. He confirmed (1927) Bertil Lindblad's theory of the Milky Way galaxy's rotation. In the 1950s he and his colleagues used radio astronomical...