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locomotive
(Encyclopedia) locomotive, vehicle used to pull a train of unpowered railroad cars. Richard Trevithick, a British engineer and inventor, built and operated (1803–4) the first successful steam…artificial limb
(Encyclopedia) artificial limb, mechanical replacement for a missing limb. An artificial limb, called a prosthesis, must be light and flexible to permit easy movement, but must also be sufficiently…dredging
(Encyclopedia) dredging, process of excavating materials underwater. It is used to deepen waterways, harbors, and docks and for mining alluvial mineral deposits, including tin, gold, and diamonds.…natural gas
(Encyclopedia) natural gas, natural mixture of gaseous hydrocarbons found issuing from the ground or obtained from specially driven wells. The composition of natural gas varies in different…Watertown
(Encyclopedia) Watertown. 1 Town (1990 pop. 20,456), Litchfield co., W Conn.; set off from Waterbury and inc. 1780. Textiles, plastics, chemicals, mattresses, and brass goods are among its…sea star
(Encyclopedia) sea star, also called starfish, echinoderm of the class Asteroidae, common in tide pools. Sea stars vary in size from under 1&fslsh;2 in. (1.3 cm) to over 3 ft (90 cm) in diameter…pressure
(Encyclopedia) pressure, in mechanics, ratio of the force acting on a surface to the area of the surface; it is thus distinct from the total force acting on a surface. A force can be applied to and…Geology of the Grand Canyon: Corrasion.
WEATHERING.CORRASION.Mr. G. K. Gilbert has embodied in his admirable monograph on the Henry Mountains, a chapter on Land Sculpture, which sets forth in most logical and condensed from the…coconut
(Encyclopedia) coconut, fruit of the coco palm (Cocos nucifera), a tree widely distributed through tropical regions. The seed is peculiarly adapted to dispersal by water because the large pod holding…liquid
(Encyclopedia) liquid, one of the three commonly recognized states in which matter occurs, i.e., that state, as distinguished from solid and gas, in which a substance has a definite volume but no…Trending
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