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Deerfield, river, United States

(Encyclopedia)Deerfield, river, 70 mi (113 km) long, rising in S Vt. and flowing S into NW Mass., then SE to the Connecticut River at Greenfield, Mass. The river has extensive hydroelectric facilities but is also a...

missal

(Encyclopedia)missal [Lat.,=of the mass], in the Roman Catholic Church, liturgical book containing all directions and texts necessary for the performance of Mass throughout the year. The Roman Missal (Missale Roman...

Mach's principle

(Encyclopedia)Mach's principle mäks [key] [for E. Mach], assertion that the inertial effects of mass are not innate in a body, but arise from its relation to the totality of all other masses, i.e., to the universe...

tachyon

(Encyclopedia)tachyon tăkˈēŏnˌ [key], hypothetical elementary particle that travels only at speeds exceeding that of light. According to the theory of relativity, the speed of light is the limiting velocity fo...

requiem

(Encyclopedia)requiem rĕkˈwēəm, rēˈ–, rāˈ– [key] [Lat.,=rest], proper Mass for the souls of the dead, performed on All Souls' Day and at funerals. The reformation of Roman Catholic liturgy following the...

Clark, Alvan

(Encyclopedia)Clark, Alvan, 1804–87, American astronomer and maker of astronomical lenses, b. Ashfield, Mass. In 1846 the firm of Alvan Clark & Sons was established at Cambridgeport, Mass.; it became famous a...

Aston, Francis William

(Encyclopedia)Aston, Francis William, 1877–1945, English physicist and chemist. He was affiliated with the Cavendish Laboratory, Cambridge, from 1910. In 1922 he received the Nobel Prize in Chemistry mainly for h...

Clark, Jonas Gilman

(Encyclopedia)Clark, Jonas Gilman, 1815–1900, founder of Clark Univ., b. Hubbardston, Mass. After a long career in business and finance, he became interested in higher education, making extended trips of observat...

Lowell, Francis Cabot

(Encyclopedia)Lowell, Francis Cabot, 1775–1817, pioneer American cotton manufacturer, b. Newburyport, Mass.; son of John Lowell (1743–1802). A merchant in Boston, he traveled (1810) to England, where he studied...

Kyrie eleison

(Encyclopedia)Kyrie eleison kĭrˈēāˌ əlāˈēsŏnˌ, –sən [key] [Gr.,=Lord, have mercy], in the Roman Catholic Church, prayer of the Mass coming after the introit, the only ordinary part of the traditional ...