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Washington Monument

(Encyclopedia)Washington Monument, obelisk-shaped tower, 555 ft 51⁄9 in. (169.3 m) high, located on a 106-acre (43-hectare) site at the west end of the Mall, Washington, D.C.; dedicated 1885. The world's tallest ...

natural law

(Encyclopedia)natural law, theory that some laws are basic and fundamental to human nature and are discoverable by human reason without reference to specific legislative enactments or judicial decisions. Natural la...

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 localities. Its chief com...

President Lincoln and Soldier's Home National Monument

(Encyclopedia)President Lincoln and Soldier's Home National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

Bridges, Calvin Blackman

(Encyclopedia)Bridges, Calvin Blackman, 1889–1938, American geneticist, b. Schuyler Falls, N.Y., grad. Columbia (B.S., 1912; Ph.D., 1916). In his research he collaborated with T. H. Morgan, A. H. Sturtevant, and ...

Arches National Park

(Encyclopedia)Arches National Park, 76,519 acres (30,979 hectares), E Utah; est. as a national monument 1929, designated a national park 1971. Located in red-rock country and overlooking the gorge of the Colorado R...

Natural Bridge

(Encyclopedia)Natural Bridge, small village, Rockbridge co., W Va., in the Shenandoah valley; founded 1774. Nearby is the famous Natural Bridge over the gorge of Cedar Creek. It is a limestone arch 215 ft (66 m) hi...

Craters of the Moon National Monument and Preserve

(Encyclopedia)Craters of the Moon National Monument and Preserve, S central Idaho; est. 1924. The monument (53,438 acres/21,625 hectares) lies at the north end of the much larger preserve (698,940 acres/282,851 hec...