A proportion used in determining the dimensional relationship of a representation to that which it represents: a world map with a scale of 1:4,560,000. b. A calibrated line, as on a map or an architectural plan, indicating such a proportion.
Yttria (yttrium oxide, Y 2 O 3), was discovered by Johann Gadolin in 1794 in a mineral called gadolinite from Ytterby. Ytterby is the site of a quarry in Sweden which contains many unusual minerals containing erbium, terbium, and ytterbium as well as yttrium.
The name Wexalia, Wuxalia, or Wecsile is the medieval name of eastern Terschelling. However, this name disappeared at the end of the Middle Ages. The last appearance of the name Wexalia is in a treaty between Folkerus Reijner Popma, then ruler of Terschelling, with king Edward IV of England in 1482.he main source of income on Terschelling is tourism. There is some agriculture, but a large part of the island has become a nature reserve. Terschelling is well known for the yearly Oerol Festival during which theatre performances are played throughout the island, making use of its landscape and nature.