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Reutlingen

(Encyclopedia)Reutlingen roitˈlĭng-ən [key], city (1994 pop. 107,607), Baden-Württemberg, SW Germany. Manufactures include textiles, paper, leather goods, iron, and machinery. Reutlingen was a free imperial cit...

Zollverein

(Encyclopedia)Zollverein tsôlˈfərīnˈ [key] [Ger.,=customs union], in German history, a customs union established to eliminate tariff barriers. Friedrich List first popularized the idea of a combination to abol...

hardness

(Encyclopedia)hardness, property of matter commonly described as the resistance of a substance to being scratched by another substance. The degree of hardness is relative, different substances being compared with o...

Messier catalog

(Encyclopedia)Messier catalog mĕsyāˈ [key], systematic list of nebulae and star clusters. A first list, compiled and published in 1771 by Charles Messier, contained 45 objects. The final list, published in 1784,...

Herschel

(Encyclopedia)Herschel hûrˈshəl [key], family of distinguished English astronomers. Sir William Herschel,Sir William Herschel, 1738–1822, born Friedrich Wilhelm Herschel, was a great pioneer in astronomy. Bor...

category, in philosophy

(Encyclopedia)category, philosophical term that literally means predication or assertion. It was first used by Aristotle, whose 10 categories formed a list of all the ways in which assertions can be made of a subje...

Powys, John Cowper

(Encyclopedia)Powys, John Cowper pōˈĭs [key], 1872–1963, British author and lecturer. In addition to his widely admired novels Wolf Solent (1929), and A Glastonbury Romance (1932), Powys also wrote poetry and ...

electromotive series

(Encyclopedia)electromotive series, list of metals whose order indicates the relative tendency to be oxidized, or to give up electrons (see oxidation and reduction); the list also includes the gas hydrogen. The ele...

Index, in the Roman Catholic Church

(Encyclopedia)Index, in the Roman Catholic Church, list of publications forbidden to be read, called Index librorum prohibitorum [list of forbidden books]. This censorship was exercised by the Holy See. Catholics a...

Ames, Joseph

(Encyclopedia)Ames, Joseph, 1689–1759, English bibliographer. He compiled Typographical Antiquities (1749), a valuable list of English books printed before 1600. ...