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sweat

(Encyclopedia)sweat or perspiration, fluid secreted by the sweat glands of mammalian skin and containing water, salts, and waste products of body metabolism such as urea. The dissolved solid content of sweat is onl...

pollution

(Encyclopedia)pollution, contamination of the environment as a result of human activities. The term pollution refers primarily to the fouling of air, water, and land by wastes (see air pollution; water pollution; s...

sublimation, in chemistry

(Encyclopedia)sublimation sŭblĭmāˈshən [key], change of a solid substance directly to a vapor without first passing through the liquid state. The term is also used to describe the reverse process of the gas ch...

Formulas for the Volumes of Some Common Solids (table)

(Encyclopedia)Formulas for the Volumes of Some Common Solids 1 Abbreviations: B = area of base; h = height; r = radius; l = length; w = width. ...

deliquescence

(Encyclopedia)deliquescence dĕlˌəkwĕsˈəns [key], conversion of a solid substance into a liquid as a result of absorption of water vapor from the air. Since impurities in a solid lower its melting point, the a...

Armour, Philip Danforth

(Encyclopedia)Armour, Philip Danforth ärˈmər [key], 1832–1901, American meatpacker, b. Stockbridge, N.Y. Armour's Chicago meatpacking plants introduced new principles of large-scale organization, as well as re...

water pollution

(Encyclopedia)water pollution, contamination of water resources by harmful wastes; see also sewerage, water supply, pollution, and environmentalism. The United States has enacted extensive federal legislation to ...

estuary

(Encyclopedia)estuary ĕsˈcho͝oĕrˌē [key], partially enclosed coastal body of water, having an open connection with the ocean, where freshwater from inland is mixed with saltwater from the sea. One type of est...

freezing

(Encyclopedia)freezing, change of a substance from the liquid to the solid state. The temperature at which freezing occurs for a pure crystalline solid is called the freezing point and is a characteristic of the pa...

Francis I, king of the Two Sicilies

(Encyclopedia)Francis I, 1777–1830, king of the Two Sicilies (1825–30), son and successor of Ferdinand I. He continued the ruthless and reactionary policy of his father, and his court was notorious for waste an...