blackout practice
51Oxygen toxicity — Classification and external resources In 1942–43 the UK Government carried out extensive testing for oxygen toxicity in divers. The chamber is pressurised with air to 3.7  …
52Duplicate bridge — tournament playing area Duplicate bridge is the most widely used variation of contract bridge in club and tournament play. It is called duplicate because the same bridge deal (i.e. the specific arrangement of the 52 cards into the four hands) is… …
53Zoo TV Tour — World tour by U2 …
54Church of Scientology — Scientology build …
55Glossary of contract bridge terms — These terms are used in Contract bridge[1][2] , or the earlier game Auction bridge, using duplicate or rubber scoring. Some of them are also used in Whist, Bid whist, and other trick taking games. This glossary supplements the Glossary of card… …
56Recovery boiler — is the part of Kraft process of pulping where chemicals for white liquor are recovered and reformed from black liquor. In the process lignin of the wood, bound in black liquor at this phase, is burned and heat generated. The heat is usually used… …
57Death of Osama bin Laden — Death of Osama bin Laden …
58Discrimination based on skin color — Part of a series on Discrimination General forms …
59Controversies surrounding Silvio Berlusconi — Silvio Berlusconi is an Italian media mogul and former Prime Minister of Italy, owning the largest broadcasting company in the country, Mediaset, his promises to sell off his personal assets, to avoid conflicts of interest, were unfulfilled, this …
60Intermittent energy source — An intermittent energy source is any source of energy that is not continuously available due to some factor outside direct control. The intermittent source may be quite predictable, for example, tidal power, but cannot be dispatched to meet the… …
