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La Mancha
La Mancha , historic region of central Spain, in historic New Castile, comprising Ciudad Real prov. and part of the provinces of Toledo, Albacete, and Cuenca. This high, barren plateau, dotted with windmills, was made famous as the scene of most of the adventures of Don Quixote de la Mancha in the n...
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neutralization
neutralization chemical reaction, according to the Arrhenius theory of acids and bases , in which a water solution of acid is mixed with a water solution of base to form a salt and water; this reaction is complete only if the resulting solution has neither acidic nor basic properties. Such a sol...
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Battle of the Bulge
Battle of the Bulge popular name in World War II for the German counterattack in the Ardennes, Dec., 1944-Jan., 1945. It is also known as the Battle of the Ardennes. On Dec. 16, 1944, a strong German force, commanded by Marshal von Rundstedt, broke the thinly held American front in the Belgi...
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buffer
buffer solution that can keep its relative acidity or alkalinity constant, i.e., keep its p H constant, despite the addition of strong acids or strong bases. Buffer solutions are frequently solutions that contain either a weak acid and one of its salts or a weak base and one of its salts. Many aci...
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Jacques Henri Bernardin de Saint-Pierre
Jacques Henri Bernardin de Saint-Pierre , 1737-1814, French naturalist and author. He was a friend of Rousseau, by whom he was strongly influenced. His chief work, Études de la nature (1784), sought to prove the existence of God from the wonders of nature; it is rich in descriptive passages...
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Imogen Cunningham
Imogen Cunningham 1883-1976, American photographer, b. Portland, Oreg. Cunningham began taking pictures in 1901. After study abroad she opened a studio in Seattle in 1910 and for six decades produced an extraordinarily varied body of work including many strong, exquisite portraits. Cunningham was a...
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raffia
raffia or raphia , fiber obtained from the raffia palm of Madagascar, exported for various uses, such as tying up plants that require support, binding together vegetables to be marketed, and weaving baskets, hats, and mats. It is also made into a native cloth that is exported as rabanna. The raf...
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truss
truss in architecture and engineering, a supporting structure or framework composed of beams, girders, or rods commonly of steel or wood lying in a single plane. A truss usually takes the form of a triangle or combination of triangles, since this design ensures the greatest rigidity. Trusses are us...
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Julien Offray de La Mettrie
Julien Offray de La Mettrie , 1709-51, French physician and philosopher. On the basis of personal observation he claimed that psychical activity is purely the result of the organic construction of the brain and nervous system and developed this theory in Histoire naturelle de l'âme (1745). T...
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John Campbell Breadalbane, 1st earl of
John Campbell Breadalbane, 1st earl of , 1635?-1717, Scottish nobleman. He took part in the royalist rising of 1654 and helped George Monck to further the restoration (1660) of Charles II. In 1688 he privately supported James II, but he did not commit himself openly and took advantage of the Act of ...
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