the inclination of two lines meeting one another in a point. See Geometry. See also Angle in the Supplement.

**Angle of Incidence**, in Optics, the angle which a ray of light makes with a perpendicular to that point of the surface of any medium on which it falls; though it is sometimes understood of the angle which it makes with the surface itself.

**Angle of Refraction** now generally means the angle which a ray of light, refracted by any medium, makes with a perpendicular to that point on the surface of which it was incident; but has sometimes been understood of the angle which it makes with the surface of the refracting medium itself.

**Angler**, a person who practises the art of angling, whether as a diversion or otherwise. See the article Angling.

**Angler**, the English name of a species of lophus. See Lophus, Ichthyology Index.

**Angles**, an ancient German nation, originally a branch of the Suevi: who, after various migrations, settled in that part of Denmark, and duchy of Sleswick, which to this day is called Angel, and of which the city of Flensburgh is the capital. Here they were known, even in the time of Tacitus, by the name of Anglii. The origin of this name is variously accounted for. According to Saxo-Grammaticus, they were called Anglii, from one Angulus, son to Humblus king of Denmark. Widsindihn, a Saxon writer, will have them to be called Anglii, from an island in the corner or angle of the sea, which they conquered. Goropius derives their name from the Saxon word Angel or Engel, signifying a fishhook; the Angles, like the other Saxon nations, being greatly addicted to piracy, and on that account being so named by the neighbouring nations; as if, like hooks, they caught all that was in the sea. To this nation the British ambassadors are said to have applied, when soliciting succours against the Scots and Picts. The Angles, therefore, came over in greater numbers than any other Saxon nation; and accordingly had the honour of giving the name of Anglia to England. See England.

**Anglesey, Isle of**, is the most western county of North Wales. It is 24 miles in length, 18 in breadth, and sends one member to parliament. It is separated from Caernarvonshire by a strait called Menai, and on every other side is surrounded by the sea.