(Encyclopedia) Ohio and Erie Canal, former waterway of Ohio, 307 mi (494 km) long, between Lake Erie at Cleveland and the Ohio River at Portsmouth; built 1825–32. It utilized part of the courses of…
(Encyclopedia) Netherlands, Austrian and Spanish, that part of the Low Countries that, from 1482 until 1794, remained under the control of the imperial house of Hapsburg. The area corresponds roughly…
(Encyclopedia) Lewis and Clark expedition, 1803–6, U.S. expedition that explored the territory of the Louisiana Purchase and the country beyond as far as the Pacific Ocean.
The men were gathered…
(Encyclopedia) Ashmore and Cartier IslandsAshmore and Cartier Islandsăshˈmōr, cärˌtē-āˈ [key], unhabited tropical islands, 2 sq mi (5 sq km), E Indian Ocean, a dependency of Australia located 190 mi…
(Encyclopedia) Kentucky and Virginia Resolutions, in U.S. history, resolutions passed in opposition to the Alien and Sedition Acts, which were enacted by the Federalists in 1798. The Jeffersonian…
(Encyclopedia) Merovingian art and architectureMerovingian art and architecturemĕrˌəvĭnˈjēən [key]. This period is named for Merovech, the founder of the first Germanic-Frankish dynasty (c.a.d. 500–a…
(Encyclopedia) art conservation and restoration, the preservation of structurally sound works of art, the halting of processes that lead to the damage of works of art, and the repair of already…
(Encyclopedia) perfluoroalkyl and polyfluoroalkyl substances (PFAS), a group of several thousand synthetic organic chemical compounds made up of a chain of carbon atoms bonded to fluorine atoms. PFAS…
