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Inness, George

(Encyclopedia)Inness, George ĭnˈĭs [key], 1825–94, American landscape painter, b. Newburgh, N.Y. His father intended Inness to be a grocer, but he showed artistic talent at an early age and was apprenticed to ...

Gould, Jay

(Encyclopedia)Gould, Jay, 1836–92, American speculator, b. Delaware co., N.Y. A country-store clerk and surveyor's assistant, he rose to control half the railroad mileage in the Southwest, New York City's elevate...

patroon

(Encyclopedia)patroon pətro͞onˈ [key] [Du.,=patron or employer], in American history, the name given to a Dutch landowner in New Netherland who exerted manorial rights in colonial times. To encourage emigration ...

ocean

(Encyclopedia)ocean, interconnected mass of saltwater covering 70.78% of the surface of the earth, often called the world ocean. It is subdivided into four (or five) major units that are separated from each other i...

All-American Canal

(Encyclopedia)All-American Canal, 80 mi (129 km) long, SE Calif.; part of the federal irrigation system of the Hoover Dam. Built between 1934 and 1940 across the Colorado Desert, the canal is entirely within the Un...

cofferdam

(Encyclopedia)cofferdam, temporary barrier for excluding water from an area that is normally submerged. Made commonly of wood, steel, or concrete sheet piling (see pile), cofferdams are used in constructing the fou...

heat exhaustion

(Encyclopedia)heat exhaustion, condition caused by overexposure to sunlight or another heat source and resulting in dehydration and salt depletion, also known as heat prostration. The symptoms are severe headaches,...

mucilage

(Encyclopedia)mucilage myo͞oˈsəlĭj [key], thick, glutinous substance, related to the natural gums, comprised usually of protein, polysaccharides, and uranides. It swells but does not dissolve in water. Mucilage...

calcium carbonate

(Encyclopedia)calcium carbonate, CaCO3, white chemical compound that is the most common nonsiliceous mineral. It occurs in two crystal forms: calcite, which is hexagonal, and aragonite, which is rhombohedral. Calci...

biosphere

(Encyclopedia)biosphere, irregularly shaped envelope of the earth's air, water, and land encompassing the heights and depths at which living things exist. The biosphere is a closed and self-regulating system (see e...