Mercury (element) is used in thermometers, barometers, manometers, sphygmomanometers, float valves, mercury switches, mercury relays, fluorescent lamps and other devices, though concerns about the element's toxicity have led to mercury thermometers and sphygmomanometers being largely phased out in clinical environments in favor of alternatives such as alcohol- or galinstan-filled glass thermometers and thermistor- or infrared-based electronic instruments. Likewise, mechanical pressure gauges and electronic strain gauge sensors have replaced mercury sphygmomanometers. Mercury remains in use in scientific research applications and in amalgam for dental restoration in some locales. It is also used in fluorescent lighting. Electricity passed through mercury vapor in a fluorescent
Real and substantial connection Real and substantial connection In Canadian law, a real and substantial connection or the real and substantial connection test is a legal principle used to determine whether a subject matter falls within a jurisdiction. The phrase was first adopted in Canada in the Supreme Court of Canada decision of "Libman v. The Queen" (1985). It is used in several circumstances in matters of conflict of laws. The test is primarily used to determine whether a Canadian court will recognize a foreign judgment where there was service ex juris. Courts will usually recognize a judgment from a foreign province or nation