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gunmetal
(Encyclopedia) gunmetal, a bronze, an alloy of copper, tin, and a small amount of zinc. Although originally used extensively for making guns (from which it received its name), it has been superseded…Copper, river, United States
(Encyclopedia) Copper, river, c.300 mi (480 km) long, rising in the Wrangell Mts., SE Alaska, and flowing S through the Chugach Mts. to the Gulf of Alaska. Copper deposits near the upper river, long…Heinze, Frederick Augustus
(Encyclopedia) Heinze, Frederick AugustusHeinze, Frederick Augustushīnˈzē [key], 1869–1914, American copper magnate, b. Brooklyn, N.Y. He went in 1889 to Butte, Mont., as engineer for a mining…leaching
(Encyclopedia) leaching, method of extraction in which a solvent is passed through a mixture to remove some desired substance from it. A simple example is the passage of boiling water through ground…pressure-treated wood
(Encyclopedia) pressure-treated wood, wood that has had a liquid preservative forced into it in order to protect against deterioration due to rot or insect attack. The most commonly used…Cu
(Encyclopedia) Cu, symbol for the element copper.Clark, William Andrews
(Encyclopedia) Clark, William Andrews, 1839–1925, U.S. Senator and copper magnate, b. Fayette co., Pa. He moved to Montana, where he amassed a large fortune from the development of copper mines. He…verdigris
(Encyclopedia) verdigrisverdigrisvûrˈdəgrēsˌ [key], one of three copper acetates: blue verdigris, Cu(CH3COO)2·CuO·6H2O; green verdigris, 2Cu(CH3COO)2·CuO·6H2O; or neutral verdigris, Cu(CH3COO)2·H2O;…brass
(Encyclopedia) brass, alloy having copper (55%–90%) and zinc (10%–45%) as its essential components. The properties of brass vary with the proportion of copper and zinc and with the addition of small…chalcopyrite
(Encyclopedia) chalcopyritechalcopyritekălˌkəpīˈrīt, kălˈkōpīˌrīt [key] or copper pyriteschalcopyritepīrīˈtēz, pə– [key], brass-yellow mineral, sometimes with an iridescent tarnish. It is a sulfide…Trending
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