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seafloor spreading
(Encyclopedia) CE5 Schematic model of the oceanic crust, showing seafloor spreading seafloor spreading, theory of lithospheric evolution that holds that the ocean floors are spreading outward from vast underwate...Harding, Warren Gamaliel
(Encyclopedia)Harding, Warren Gamaliel gəmāˈlēəl [key], 1865–1923, 29th President of the United States (1921–23), b. Blooming Grove (now Corsica), Ohio. After study (1879–82) at Ohio Central College, he ...poll
(Encyclopedia)poll, technique for ascertaining the attitudes or opinions of the total, or some segment of the total, population on given questions, usually on political, economic, and social conditions. Sampling ...Henry IV, king of England
(Encyclopedia)Henry IV, 1367–1413, king of England (1399–1413), eldest son of John of Gaunt and grandson of Edward III; called Henry of Bolingbroke. He founded the Lancastrian dynasty. The new king was immed...Presidents of the United States (table)
(Encyclopedia)Presidents of the United StatesGettysburg campaign
(Encyclopedia)Gettysburg campaign, June–July, 1863, series of decisive battles of the U.S. Civil War. The Gettysburg battles included more than 160,000 soldiers and many camp laborers. These included thousands ...South African literature
(Encyclopedia)South African literature, literary works written in South Africa or written by South Africans living in other countries. Populated by diverse ethnic and language groups, South Africa has a distinctive...electoral college
(Encyclopedia)electoral college, in U.S. government, the body of electors that chooses the president and vice president. The Constitution, in Article 2, Section 1, provides: “Each State shall appoint, in such Man...diamond
(Encyclopedia)diamond, mineral, one of two crystalline forms of the element carbon (see allotropy), the hardest natural substance known, used as a gem and in industry. The discoveries of 1870–71 in South Africa...Ford, Henry
(Encyclopedia)Ford, Henry, 1863–1947, American industrialist, pioneer automobile manufacturer, b. Dearborn, Mich. Henry Ford's son, Edsel Bryant Ford, 1893–1943, b. Detroit, shared in the control of the vast ...Browse by Subject
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