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aberration

(Encyclopedia)CE5 A. Spherical aberration: Light rays near the edge of the lens are bent more and brought to focus nearer to the lens. B. Chromatic aberration: Shorter wavelengths (higher frequencies) are bent m...

Mountain Meadows

(Encyclopedia)Mountain Meadows, small valley in extreme SW Utah, where in 1857 a party of some 140 emigrants bound for California were massacred. It was a period when friction between Mormons and non-Mormons was ac...

Mackenzie, William Lyon

(Encyclopedia)Mackenzie, William Lyon, 1795–1861, Canadian journalist and insurgent leader, b. Scotland; grandfather of William Lyon Mackenzie King. Emigrating to Upper Canada in 1820, he published (1824–34), f...

Kentucky and Virginia Resolutions

(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 Republicans first r...

Aśoka

(Encyclopedia)Aśoka əshōˈkə, –sōˈk– [key] or Ashoka, d. c.232 b.c., Indian emperor (c.273–c.232 b.c.) of the Maurya dynasty; grandson of Chandragupta. One of the greatest rulers of ancient India, he br...

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 object will produ...

Bode's law

(Encyclopedia)Bode's law [for J. E. Bode], also known as Titius's law or the Titius-Bode law, empirical relationship between the mean distances of the planets from the sun. If each number in the series 0, 3, 6, 12,...

Stanton, Elizabeth Cady

(Encyclopedia)Stanton, Elizabeth Cady, 1815–1902, American reformer, a leader of the woman-suffrage movement, b. Johnstown, N.Y. She was educated at the Troy Female Seminary (now Emma Willard School) in Troy, N.Y...

Adams, Samuel

(Encyclopedia)Adams, Samuel, 1722–1803, political leader in the American Revolution, signer of the Declaration of Independence, b. Boston, Mass.; second cousin of John Adams. An unsuccessful businessman, he becam...

Trent Affair

(Encyclopedia)Trent Affair, incident in the diplomatic relations between the United States and Great Britain, which occurred during the American Civil War. On Nov. 8, 1861, the British mail packet Trent, carrying J...