The Liber Eliensis ("Book of Ely") is a 12th-century English chronicle and history, written in Latin. Composed in three books, it was written at Ely Abbey on the island of Ely in the fenlands of eastern Cambridgeshire. Ely Abbey became the cathedral of a newly formed bishopric in 1109. The Liber covers the period from the founding of the abbey in 673 until the middle of the 12th century, building on a number of earlier historical works. It incorporates documents and stories of saints' lives and is a typical example of a kind of local history produced during the latter part of the 12th century. The longest of the contemporary local histories, it describes the devastation caused by the disorders during the reign of King Stephen, as well as the career of Nigel (Bishop of Ely 1133–69) and his disputes with the king. The two surviving complete manuscripts of the work are complemented by a number of partial manuscripts. A printed version of the Latin text appeared in 1963 and an English translation was published in 2005. The Liber Eliensis is an important source of historical information for the region and period it covers, and particularly for the abbey and bishopric of Ely. (Full article...)
A diagram of a typical coal-firedthermal power station, a type of power plant in which the prime mover is steam driven. Water is heated, turns into steam and spins a steam turbine, which drives an electrical generator. After it passes through the turbine, the steam is condensed in a condenser and recycled to where it was heated; this is known as a Rankine cycle. For a more detailed overview of the process, consult the diagram's description.