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ruthenium

(Encyclopedia)ruthenium ro͞othēˈnēəm [key], metallic chemical element; symbol Ru; at. no. 44; at. wt. 101.07; m.p. about 2,310℃; b.p. about 3,900℃; sp. gr. 12.41 at 20℃; valence commonly +2, +3, +4, +6, ...

stibnite

(Encyclopedia)stibnite stĭbˈnīt [key], antimony sulfide, Sb2S3, a mineral, silvery gray in color, with a metallic luster. It crystallizes in the orthorhombic system. Found in many parts of the world, it is the m...

Chadwick, Lynn

(Encyclopedia)Chadwick, Lynn (Lynn Russell Chadwick), 1914–2003, English sculptor. After studying architecture, Chadwick began his career as a sculptor in 1945, working largely in metal. He came to international ...

Hudson, towns, United States

(Encyclopedia)Hudson. 1 Industrial town (2020 pop. 20,092), Middlesex co., E central Mass., on the Assabet River, in an apple-growing region; settled c.1699, ...

welding

(Encyclopedia)welding, process for joining separate pieces of metal in a continuous metallic bond. Cold-pressure welding is accomplished by the application of high pressure at room temperature; forge welding (forgi...

hydrogen chloride

(Encyclopedia)hydrogen chloride, chemical compound, HCl, a colorless, poisonous gas with an unpleasant, acrid odor. It is very soluble in water and readily soluble in alcohol and ether. It fumes in moist air. It is...

wire

(Encyclopedia)wire, metal filament, strand, or solid rod usually having a round cross section. Metals and alloys used for wiremaking are chosen for high tensile strength and ductility or for their electrical conduc...

lutetium

(Encyclopedia)lutetium, formerly lutecium both: lo͞otēˈshēəm [key], metallic chemical element; symbol Lu; atomic number 71; at. wt. 174.9668; m.p. about 1,663℃; b.p. about 3,395℃; sp. gr. 9.835 at 25℃; v...

cire perdue

(Encyclopedia)cire perdue sēr pĕrdüˈ [key] [Fr.,=lost wax], sculptural process of metal casting that may be used for hollow and solid casting. The sculptor makes a model in plaster or clay that is then coated w...

Hammond

(Encyclopedia)Hammond. 1 City (2020 pop. 77,879), Lake co., extreme NW Ind., bounded by Lake Michigan, the Ill. state line, and the Little Calumet River, and ...