Friday, November 18, 2005


Ancient people of Italy originally inhabiting the region watered by the tributaries of the Avens River (modern Velino). Long hostile to Rome, they became especially menacing in the 5th century BC, advancing to the Alban Hills. Although repulsed by the Romans in 431, the Aequi were not completely subdued by Rome until the end of the Second Samnite War (304 BC), when they received civitas

Sunday, October 16, 2005

Vacuum Technology

Capacities >are available from 1/2 to 1,000 cubic feet per minute, operating from atmospheric pressure down to as low as 2 ´ 10-2 torr for single-stage pumps and less than 5 ´ 10-3 torr for two-stage pumps. The pumps develop their full speed from atmosphere to about one torr, the speed then decreasing to zero at their ultimate pressures. One device of this type, useful for pumping both liquids

Thursday, July 28, 2005

Swanton, John Reed

Swanton studied with anthropologist Franz Boas at Columbia University for two years but received

Wednesday, July 27, 2005


Genus of tropical orchids, family Orchidaceae, with about 1,000 species that are distributed from southeastern North America to central South America. Epidendrum species are primarily epiphytic (supported by other plants and having aerial roots exposed to the humid atmosphere), but some grow on rocks or in soil. Flowers are usually borne on a terminal

Sunday, July 24, 2005


Also spelled  Cirenaica , Arabic  Barqah  historic region of North Africa and until 1963 a province of the United Kingdom of Libya. As early as c. 631 BC Greek colonists settled the northern half of ancient Cyrenaica, known then as Pentapolis for the five major cities they established: Euhesperides (Banghazi), Barce (al-Marj), Cyrene (Shahhat), Apollonia (Marsa Susah), and Tenchira (Tukrah). In later times Ptolemais (Tulmaythah) and Daims-Zarine

Thursday, July 07, 2005

Arron, Henck

Arron worked in banks in The Netherlands and Dutch Guiana before entering politics in 1963. He was elected to the Staten (Suriname legislature) that

Wednesday, June 29, 2005


In mathematics, an expression based on the derivative (q.v.) of a function, useful for approximating certain values of the function. The derivative of a function at the point x0, written as f¢(x0), is defined as the limit as Dx approaches 0 of the quotient Dy/Dx, in which Dy is f(x0 + Dx) - f(x0). Because the derivative is defined as the limit, the closer Dx is to 0, the closer will be the quotient to the derivative. Therefore,