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Secord, Laura (Ingersoll)

(Encyclopedia) Secord, Laura (Ingersoll)Secord, Laura (Ingersoll)sēˈkôrd [key], 1775–1868, Canadian heroine of the War of 1812. Born in Massachusetts, she was taken by her parents to Canada after the…

Donner Party

(Encyclopedia) Donner Party, group of emigrants to California who in the winter of 1846–47 met with one of the most famous tragedies in Western history. The California-bound families were mostly from…

hardening

(Encyclopedia) hardening, in metallurgy, treatment of metals to increase their resistance to penetration. A metal is harder when it has small grains, which result when the metal is cooled rapidly.…

parity

(Encyclopedia) parity or space parity, in physics, quantity that refers to the relationship between an object or process and the image that it can produce in a mirror. For example, any right-handed…

Petraeus, David Howell

(Encyclopedia) Petraeus, David HowellPetraeus, David Howellpĕtrāˈəs [key], 1952–, American military officer and government official, b. Cornwall, N.Y., studied West Point (B.S., 1974), U.S. Army…

Perspective

Perspective is a way of showing space in three dimensions. By using perspective, a flat picture can seem to show depth and distance, just as your eye would see it.Cape Cod Evening by Edward Hopper…

du Bois, Guy Pène

(Encyclopedia) du Bois, Guy Pènedu Bois, Guy Pènegē pĕn dü bwä [key], 1884–1958, American painter and critic, b. Brooklyn, N.Y.; studied under William Chase and in Paris. In New York City after 1906…