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doldrums

(Encyclopedia)doldrums dŏlˈdrəmz [key] or equatorial belt of calms, area around the earth centered slightly north of the equator between the two belts of trade winds. The large amount of solar radiation that arr...

Frasch process

(Encyclopedia)Frasch process fräsh [key] [for Herman Frasch, the German-American chemist who devised it], process for the extraction of sulfur from subsurface deposits. Three pipes, one inside another, are sunk to...

production

(Encyclopedia)production, in economics, all those activities that have to do with the creation of commodities, by imparting to raw materials utility, added value, or the ability to satisfy human wants. The farmer w...

proton

(Encyclopedia)proton, elementary particle having a single positive electrical charge and constituting the nucleus of the ordinary hydrogen atom. The positive charge of the nucleus of any atom is due to its protons....

Ames, Nathaniel

(Encyclopedia)Ames, Nathaniel, 1708–64, American almanac maker, b. Bridgewater, Mass. His Astronomical Diary and Almanack, begun in 1725 and issued annually after c.1732 from Dedham, Mass., was highly popular and...

vigil

(Encyclopedia)vigil vĭjˈəl [key] [Lat.,=watch], in Christian calendars, eve of a feast, a day of penitential preparation. In ancient times worshipers gathered for vespers before a great feast and then waited out...

Taconic Mountains

(Encyclopedia)Taconic Mountains təkŏnˈĭk [key], range of the Appalachian Mts., extending c.150 mi (240 km) north-south between the Green Mts. and the Hudson Valley along parts of New York's border with Vermont,...

Williams, John, American clergyman

(Encyclopedia)Williams, John, 1664–1729, American clergyman, b. Roxbury, Mass., grad. Harvard, 1683. In 1686 he became the first minister at Deerfield, Mass. During the great Native American massacre at that fron...

automobile

(Encyclopedia)CE5 Automobile chassis CE5 Two views of a six-cylinder automobile engine automobile, self-propelled vehicle used for travel on land. The term is commonly applied to a four-wheeled vehicle desig...

gas mask

(Encyclopedia)gas mask, face covering or device used to protect the wearer from injurious gases and other noxious materials by filtering and purifying inhaled air. In addition to military use (see chemical warfare)...