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Příbram

(Encyclopedia)Příbram pərzhĭbˈräm [key], town (1991 pop. 36,898), SW Czech Republic, in Bohemia. It is one of the oldest gold- and silver-mining centers of Bohemia, with mine shafts more than 3,000 ft (914 m)...

Fresnillo

(Encyclopedia)Fresnillo frāsnēˈyō [key], city, Zacatecas state, N central Mexico. The city, a rail and ...

antioxidant

(Encyclopedia)antioxidant, substance that prevents or slows the breakdown of another substance by oxygen. Synthetic and natural antioxidants are used to slow the deterioration of gasoline and rubber, and such antio...

Omagh

(Encyclopedia)Omagh ōˈmä [key], town (1991 pop. 14,627), Omagh dist., W Northern Ireland, on the Strule River. The town is a farm market. Dairy products are processed and shirts are manufactured. The discovery i...

Babbitt metal

(Encyclopedia)Babbitt metal, an antifriction metal first produced by Isaac Babbitt in 1839. In present-day usage the term is applied to a whole class of silver-white bearing metals, or “white metals.” These all...

Sikhote-Alin

(Encyclopedia)Sikhote-Alin sēkhətĕ-əlyēnˈyə [key], mountain range, c.625 mi (990 km) long, S Russian Far East. It is composed of a series of ridges lying between the Sea of Japan and the Ussuri and Amur rive...

Čáslavská, Věra

(Encyclopedia)Čáslavská, Věra, 1942–2016, Czechoslovak gymnast, b. Prague. Čáslavská revolutionized a formerly dance-based sport with her athleticism and panache, winning 22 international titles (seven Oly...

pulley

(Encyclopedia)CE5 Pulleys: The mechanical advantage (MA) of a system of pulleys is equal to the number of supporting strands: in A MA=1 and in B MA=2. pulley, simple machine consisting of a wheel over which a r...

Meriden

(Encyclopedia)Meriden mĕrˈĭdən [key], city (1990 pop. 59,479), New Haven co., S central Conn.; settled 1661, inc. as a town 1806, as a city 1867, town and city consolidated 1922. Silverware and pewter were made...

malleability

(Encyclopedia)malleability, property of a metal describing the ease with which it can be hammered, forged, pressed, or rolled into thin sheets. Metals vary in this respect; pure gold is the most malleable. Silver, ...