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EQUATOR (Late Lat. aequator, from aequare, to make equal), in geography, that great circle of the earth, equidistant from the two poles, which divides the northern from the southern hemisphere and lies in a plane perpendicular to the axis of the earth ; this i ...

... ral name of the Portuguese possessions on the west coast of Africa south of the equator. With the exception of the enclave of Kabinda (q.v.) the province lies wholly south of the river Congo. Bounded on the W. by the Atlantic Ocean, it extends along the coast ...

... the gibbons of S. E. Asia, the orangs of Borneo and Sumatra, the gorillas of W. Equatorial Africa, and the chimpanzees of W. and Central Equatorial Africa. Each of these apes resembles man most in some one physical characteristic: the gibbons in the formation ...

... astronomy. In its simplest form, consisting of a ring fixed in the plane of the equator, the armilla is one of the most ancient of astronomical instruments. Slightly developed, it was crossed by another ring fixed in the plane of the meridian. The first was an ...

... idered complete astrolabe. Tycho's armillae were astrolabes. In fact the modern equatorial, and the altitude and azimuth circle are astrolabes in the strictest and oldest meaning of the term; and Tycho in one of his astrolabes came so near the modern equatoria ...

... and South Poles. The fundamental plane perpendicular to it is the plane of the equator. This plane intersects the earth's surface in the terrestrial equator. Coordinates referred to this system are termed equatorial. A system of equatorial co-ordinates may al ...

... s George Gordon, who had recently succeeded Sir Samuel Baker as governor of the equatorial provinces of Egypt, invited Schnitzer, who was now known as " Emin Effendi," to join him at Lado on the upper Nile. Although nominally Gordon's medical officer, Emin was ...

... and territory, nearly though not entirely so enclosed, e.g. the Lado Enclave in equatorial Africa.

... oment at which, or the point at which, the sun apparently crosses the celestial equator. Since the sun moves in the ecliptic, it is in the last-named sense the point of intersection of the ecliptic and the celestial equator. This is the usual meaning of the te ...

... d are the large Negrito family, represented in Africa by the dwarf races of the equatorial forests, the Akkas, Batwas, Wochuas and others, and beyond Africa by the Andaman Islanders, the Aetas of the Philippines, and probably the Senangs and other aboriginal t ...

UBANGI, a river of Equatorial Africa, the chief northern affluent of the Congo (q.v.). The Ubangi (otherwise Mubangi or Mobangi) enters the Congo by various mouths between o° 22' and o° 37' S. and 17° 40' and 17° 50' E. The main channel, fully i m. wide, joins ...

... res is determined by the intermediate position of the United States between the equator and the north pole; the second by the equatorial-polar temperature contrast and the eastward rotation of the planet. Next, dependent on the inclination of the earth's axis, ...