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chemical industry
(Encyclopedia)chemical industry, the business of using chemical reactions to turn raw materials, such as coal, oil, and salt, into a variety of products. During the 19th and 20th cent. technological advances in the...castle
(Encyclopedia)castle, type of fortified dwelling characteristic of the Middle Ages. Fortification of towns had been in practice since antiquity, but in the 9th cent. feudal lords began to develop the private fortre...rocket, in aeronautics
(Encyclopedia)CE5 Relative positions of the components of the Saturn V rocket, the U.S. space vehicle used in the moon missions rocket, any vehicle propelled by ejection of the gases produced by combustion of s...Chinese Dynasties (table)
(Encyclopedia)Chinese Dynastiesnavy
(Encyclopedia)navy, originally, all ships of a nation, whether for war or commerce; the term navy now designates only such vessels as are built and maintained specifically for war. There have been three major devel...sulfur
(Encyclopedia)CE5 Sulfur crystals sulfur or sulphur sŭlˈfər [key], nonmetallic chemical element; symbol S; at. no. 16; interval in which at. wt. ranges 32.059–32.076; m.p. 112.8℃ (rhombic), 119.0℃ (mon...chemical warfare
(Encyclopedia)chemical warfare, employment in war of incendiaries, poison gases, and other chemical substances. Ancient armies attacking or defending fortified cities threw burning oil and fireballs. A primitive ty...Penal Laws
(Encyclopedia)Penal Laws, in English and Irish history, term generally applied to the body of discriminatory and oppressive legislation directed chiefly against Roman Catholics but also against Protestant nonconfor...James I, king of England
(Encyclopedia)James I, 1566–1625, king of England (1603–25) and, as James VI, of Scotland (1567–1625). James's reign witnessed the beginnings of English colonization in North America (Jamestown was founded in...Delaware, state, United States
(Encyclopedia)CE5 Delaware dĕlˈəwâr, –wər [key], one of the Middle Atlantic states of the United States, the country's second smallest state (after Rhode Island). It is bordered by Maryland (W, S), and th...Browse by Subject
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